xen: memory initialization/balloon fixes (#3)

xen: memory initialization/balloon fixes (#3)

[David Vrabel]

This set of patches fixes some bugs in the memory initialization under
Xen and in Xen's memory balloon driver.  They can make 100s of MB of
additional RAM available (depending on the system/configuration).

Patch 1 is already applied.

Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
with patch 1 considered for 3.0 stable).

Patch 3 is a bug fix and should be queued for 3.1 and possibly
queued for the 3.0 stable tree.

Patches 5 & 6 increase the amount of low memory in 32 bit domains
started with < 1 GiB of RAM.  Please queue for 3.2

Patch 7 releases all pages in the initial allocation with PFNs that
lie within a 1-1 mapping.  This seems correct to me as I think that
once the 1-1 mapping is set the MFN of the original page is lost so
it's no longer accessible by the kernel (and it cannot be used by
another domain

Changes since #2:

- New patch: xen: avoid adding non-existant memory if the reservation
  is unlimited
- Avoid using a hypercall to get the current number of pages in the
  ballon driver.  Apparently the hypercall won't return the right
  value if paging is used.
- Addresses Konrad's review comments.

David

[PATCH 1/7] xen: use maximum reservation to limit amount of usable RAM

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

Use the domain's maximum reservation to limit the amount of extra RAM
for the memory balloon. This reduces the size of the pages tables and
the amount of reserved low memory (which defaults to about 1/32 of the
total RAM).

On a system with 8 GiB of RAM with the domain limited to 1 GiB the
kernel reports:

Before:

Memory: 627792k/4472000k available

After:

Memory: 549740k/11132224k available

A increase of about 76 MiB (~1.5% of the unused 7 GiB).  The reserved
low memory is also reduced from 253 MiB to 32 MiB.  The total
additional usable RAM is 329 MiB.

For dom0, this requires at patch to Xen ('x86: use 'dom0_mem' to limit
the number of pages for dom0')[1].

[1] http://lists.xensource.com/archives/html/xen-devel/2011-08/msg00567.html

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index df118a8..c3b8d44 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -184,6 +184,19 @@ static unsigned long __init xen_set_identity(const struct e820entry *list,
 					PFN_UP(start_pci), PFN_DOWN(last));
 	return identity;
 }
+
+static unsigned long __init xen_get_max_pages(void)
+{
+	unsigned long max_pages = MAX_DOMAIN_PAGES;
+	domid_t domid = DOMID_SELF;
+	int ret;
+
+	ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
+	if (ret > 0)
+		max_pages = ret;
+	return min(max_pages, MAX_DOMAIN_PAGES);
+}
+
 /**
  * machine_specific_memory_setup - Hook for machine specific memory setup.
  **/
@@ -292,6 +305,12 @@ char * __init xen_memory_setup(void)
 
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 
+	extra_limit = xen_get_max_pages();
+	if (extra_limit >= max_pfn)
+		extra_pages = extra_limit - max_pfn;
+	else
+		extra_pages = 0;
+
 	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
 
 	/*
-- 
1.7.2.5

Re: [PATCH 1/7] xen: use maximum reservation to limit amount of usable RAM

[Konrad Rzeszutek Wilk]

On Thu, Sep 15, 2011 at 01:29:22PM +0100, David Vrabel wrote:
> From: David Vrabel <david.vrabel@citrix.com>
> 
> Use the domain's maximum reservation to limit the amount of extra RAM
> for the memory balloon. This reduces the size of the pages tables and
> the amount of reserved low memory (which defaults to about 1/32 of the
> total RAM).
> 
> On a system with 8 GiB of RAM with the domain limited to 1 GiB the
> kernel reports:
> 
> Before:
> 
> Memory: 627792k/4472000k available
> 
> After:
> 
> Memory: 549740k/11132224k available
> 
> A increase of about 76 MiB (~1.5% of the unused 7 GiB).  The reserved
> low memory is also reduced from 253 MiB to 32 MiB.  The total
> additional usable RAM is 329 MiB.
> 
> For dom0, this requires at patch to Xen ('x86: use 'dom0_mem' to limit
> the number of pages for dom0')[1].

Not going to pick this one up as it already is in 3.1.

> 
> [1] http://lists.xensource.com/archives/html/xen-devel/2011-08/msg00567.html
> 
> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
> ---
>  arch/x86/xen/setup.c |   19 +++++++++++++++++++
>  1 files changed, 19 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> index df118a8..c3b8d44 100644
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -184,6 +184,19 @@ static unsigned long __init xen_set_identity(const struct e820entry *list,
>  					PFN_UP(start_pci), PFN_DOWN(last));
>  	return identity;
>  }
> +
> +static unsigned long __init xen_get_max_pages(void)
> +{
> +	unsigned long max_pages = MAX_DOMAIN_PAGES;
> +	domid_t domid = DOMID_SELF;
> +	int ret;
> +
> +	ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
> +	if (ret > 0)
> +		max_pages = ret;
> +	return min(max_pages, MAX_DOMAIN_PAGES);
> +}
> +
>  /**
>   * machine_specific_memory_setup - Hook for machine specific memory setup.
>   **/
> @@ -292,6 +305,12 @@ char * __init xen_memory_setup(void)
>  
>  	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
>  
> +	extra_limit = xen_get_max_pages();
> +	if (extra_limit >= max_pfn)
> +		extra_pages = extra_limit - max_pfn;
> +	else
> +		extra_pages = 0;
> +
>  	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
>  
>  	/*
> -- 
> 1.7.2.5

[PATCH 2/7] xen: avoid adding non-existant memory if the reservation is unlimited

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

If the domain's reservation is unlimited, too many pages are added to
the balloon memory region.  Correctly check the limit so the number of
extra pages is not increased in this case.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index c3b8d44..46d6d21 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -306,10 +306,12 @@ char * __init xen_memory_setup(void)
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 
 	extra_limit = xen_get_max_pages();
-	if (extra_limit >= max_pfn)
-		extra_pages = extra_limit - max_pfn;
-	else
-		extra_pages = 0;
+	if (max_pfn + extra_pages > extra_limit) {
+		if (extra_limit > max_pfn)
+			extra_pages = extra_limit - max_pfn;
+		else
+			extra_pages = 0;
+	}
 
 	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
 
-- 
1.7.2.5

Re: [PATCH 2/7] xen: avoid adding non-existant memory if the reservation is unlimited

[Unknown, Konrad Rzeszutek]

On Thu, Sep 15, 2011 at 01:29:23PM +0100, David Vrabel wrote:
> From: David Vrabel <david.vrabel@citrix.com>
> 
> If the domain's reservation is unlimited, too many pages are added to
> the balloon memory region.  Correctly check the limit so the number of
> extra pages is not increased in this case.

and this one is in 3.1 too. Albeit with a more verbose description.
Look in git commit: e3b73c4a25e9a5705b4ef28b91676caf01f9bc9f

> 
> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
> ---
>  arch/x86/xen/setup.c |   10 ++++++----
>  1 files changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> index c3b8d44..46d6d21 100644
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -306,10 +306,12 @@ char * __init xen_memory_setup(void)
>  	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
>  
>  	extra_limit = xen_get_max_pages();
> -	if (extra_limit >= max_pfn)
> -		extra_pages = extra_limit - max_pfn;
> -	else
> -		extra_pages = 0;
> +	if (max_pfn + extra_pages > extra_limit) {
> +		if (extra_limit > max_pfn)
> +			extra_pages = extra_limit - max_pfn;
> +		else
> +			extra_pages = 0;
> +	}
>  
>  	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
>  
> -- 
> 1.7.2.5

[PATCH 3/7] xen/balloon: account for pages released during memory setup

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

In xen_memory_setup() pages that occur in gaps in the memory map are
released back to Xen.  This reduces the domain's current page count in
the hypervisor.  The Xen balloon driver does not correctly decrease
its initial current_pages count to reflect this.  If 'delta' pages are
released and the target is adjusted the resulting reservation is
always 'delta' less than the requested target.

This affects dom0 if the initial allocation of pages overlaps the PCI
memory region but won't affect most domU guests that have been setup
with pseudo-physical memory maps that don't have gaps.

Fix this by accouting for the released pages when starting the balloon
driver.

If the domain's targets are managed by xapi, the domain may eventually
run out of memory and die because xapi currently gets its target
calculations wrong and whenever it is restarted it always reduces the
target by 'delta'.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c  |    7 ++++++-
 drivers/xen/balloon.c |    4 +++-
 include/xen/page.h    |    2 ++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 46d6d21..c983717 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -39,6 +39,9 @@ extern void xen_syscall32_target(void);
 /* Amount of extra memory space we add to the e820 ranges */
 phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
 
+/* Number of pages released from the initial allocation. */
+unsigned long xen_released_pages;
+
 /* 
  * The maximum amount of extra memory compared to the base size.  The
  * main scaling factor is the size of struct page.  At extreme ratios
@@ -313,7 +316,9 @@ char * __init xen_memory_setup(void)
 			extra_pages = 0;
 	}
 
-	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
+	xen_released_pages = xen_return_unused_memory(xen_start_info->nr_pages,
+						      &e820);
+	extra_pages += xen_released_pages;
 
 	/*
 	 * Clamp the amount of extra memory to a EXTRA_MEM_RATIO
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 5dfd8f8..4f59fb3 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -565,7 +565,9 @@ static int __init balloon_init(void)
 
 	pr_info("xen/balloon: Initialising balloon driver.\n");
 
-	balloon_stats.current_pages = xen_pv_domain() ? min(xen_start_info->nr_pages, max_pfn) : max_pfn;
+	balloon_stats.current_pages = xen_pv_domain()
+		? min(xen_start_info->nr_pages - xen_released_pages, max_pfn)
+		: max_pfn;
 	balloon_stats.target_pages  = balloon_stats.current_pages;
 	balloon_stats.balloon_low   = 0;
 	balloon_stats.balloon_high  = 0;
diff --git a/include/xen/page.h b/include/xen/page.h
index 0be36b9..92b61f8 100644
--- a/include/xen/page.h
+++ b/include/xen/page.h
@@ -5,4 +5,6 @@
 
 extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
 
+extern unsigned long xen_released_pages;
+
 #endif	/* _XEN_PAGE_H */
-- 
1.7.2.5

Re: [PATCH 3/7] xen/balloon: account for pages released during memory setup

[Konrad Rzeszutek Wilk]

On Thu, Sep 15, 2011 at 01:29:24PM +0100, David Vrabel wrote:
> From: David Vrabel <david.vrabel@citrix.com>
> 
> In xen_memory_setup() pages that occur in gaps in the memory map are
> released back to Xen.  This reduces the domain's current page count in
> the hypervisor.  The Xen balloon driver does not correctly decrease
> its initial current_pages count to reflect this.  If 'delta' pages are
> released and the target is adjusted the resulting reservation is
> always 'delta' less than the requested target.
> 
> This affects dom0 if the initial allocation of pages overlaps the PCI
> memory region but won't affect most domU guests that have been setup
> with pseudo-physical memory maps that don't have gaps.
> 
> Fix this by accouting for the released pages when starting the balloon
> driver.

Does this make the behaviour of the pvops guest be similar to the
old-style XenOLinux? If so, perhaps we should include that in the git
description for usability purposes (ie, when somebody searches the git
log for what has happened in v3.2 Linux).
> 
> If the domain's targets are managed by xapi, the domain may eventually
> run out of memory and die because xapi currently gets its target
> calculations wrong and whenever it is restarted it always reduces the
> target by 'delta'.

> 
> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
> ---
>  arch/x86/xen/setup.c  |    7 ++++++-
>  drivers/xen/balloon.c |    4 +++-
>  include/xen/page.h    |    2 ++
>  3 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> index 46d6d21..c983717 100644
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -39,6 +39,9 @@ extern void xen_syscall32_target(void);
>  /* Amount of extra memory space we add to the e820 ranges */
>  phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
>  
> +/* Number of pages released from the initial allocation. */
> +unsigned long xen_released_pages;
> +
>  /* 
>   * The maximum amount of extra memory compared to the base size.  The
>   * main scaling factor is the size of struct page.  At extreme ratios
> @@ -313,7 +316,9 @@ char * __init xen_memory_setup(void)
>  			extra_pages = 0;
>  	}
>  
> -	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);
> +	xen_released_pages = xen_return_unused_memory(xen_start_info->nr_pages,
> +						      &e820);
> +	extra_pages += xen_released_pages;
>  
>  	/*
>  	 * Clamp the amount of extra memory to a EXTRA_MEM_RATIO
> diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
> index 5dfd8f8..4f59fb3 100644
> --- a/drivers/xen/balloon.c
> +++ b/drivers/xen/balloon.c
> @@ -565,7 +565,9 @@ static int __init balloon_init(void)
>  
>  	pr_info("xen/balloon: Initialising balloon driver.\n");
>  
> -	balloon_stats.current_pages = xen_pv_domain() ? min(xen_start_info->nr_pages, max_pfn) : max_pfn;
> +	balloon_stats.current_pages = xen_pv_domain()
> +		? min(xen_start_info->nr_pages - xen_released_pages, max_pfn)
> +		: max_pfn;
>  	balloon_stats.target_pages  = balloon_stats.current_pages;
>  	balloon_stats.balloon_low   = 0;
>  	balloon_stats.balloon_high  = 0;
> diff --git a/include/xen/page.h b/include/xen/page.h
> index 0be36b9..92b61f8 100644
> --- a/include/xen/page.h
> +++ b/include/xen/page.h
> @@ -5,4 +5,6 @@
>  
>  extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
>  
> +extern unsigned long xen_released_pages;
> +
>  #endif	/* _XEN_PAGE_H */
> -- 
> 1.7.2.5
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

[PATCH 4/7] xen/balloon: simplify test for the end of usable RAM

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

When initializing the balloon only max_pfn needs to be checked
(max_pfn will always be <= e820_end_of_ram_pfn()) and improve the
confusing comment.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 drivers/xen/balloon.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 4f59fb3..9efb993 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -586,16 +586,16 @@ static int __init balloon_init(void)
 #endif
 
 	/*
-	 * Initialise the balloon with excess memory space.  We need
-	 * to make sure we don't add memory which doesn't exist or
-	 * logically exist.  The E820 map can be trimmed to be smaller
-	 * than the amount of physical memory due to the mem= command
-	 * line parameter.  And if this is a 32-bit non-HIGHMEM kernel
-	 * on a system with memory which requires highmem to access,
-	 * don't try to use it.
+	 * Initialize the balloon with pages from the extra memory
+	 * region (see arch/x86/xen/setup.c).
+	 *
+	 * If the amount of usable memory has been limited (e.g., with
+	 * the 'mem' command line parameter), don't add pages beyond
+	 * this limit.
 	 */
-	extra_pfn_end = min(min(max_pfn, e820_end_of_ram_pfn()),
-			    (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size));
+	extra_pfn_end = min(max_pfn,
+			    (unsigned long)PFN_DOWN(xen_extra_mem_start
+						    + xen_extra_mem_size));
 	for (pfn = PFN_UP(xen_extra_mem_start);
 	     pfn < extra_pfn_end;
 	     pfn++) {
-- 
1.7.2.5

[PATCH 5/7] xen: allow balloon driver to use more than one memory region

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

Allow the xen balloon driver to populate its list of extra pages from
more than one region of memory.  This will allow platforms to provide
(for example) a region of low memory and a region of high memory.

The maximum possible number of extra regions is 128 (== E820MAX) which
is quite large so xen_extra_mem is placed in __initdata.  This is safe
as both xen_memory_setup() and balloon_init() are in __init.

The balloon regions themselves are not altered (i.e., there is still
only the one region).

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c  |   20 ++++++++++----------
 drivers/xen/balloon.c |   44 +++++++++++++++++++++++++++-----------------
 include/xen/page.h    |   10 +++++++++-
 3 files changed, 46 insertions(+), 28 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index c983717..0c8e974 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -37,7 +37,7 @@ extern void xen_syscall_target(void);
 extern void xen_syscall32_target(void);
 
 /* Amount of extra memory space we add to the e820 ranges */
-phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
+struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
 
 /* Number of pages released from the initial allocation. */
 unsigned long xen_released_pages;
@@ -59,7 +59,7 @@ static void __init xen_add_extra_mem(unsigned long pages)
 	unsigned long pfn;
 
 	u64 size = (u64)pages * PAGE_SIZE;
-	u64 extra_start = xen_extra_mem_start + xen_extra_mem_size;
+	u64 extra_start = xen_extra_mem[0].start + xen_extra_mem[0].size;
 
 	if (!pages)
 		return;
@@ -69,7 +69,7 @@ static void __init xen_add_extra_mem(unsigned long pages)
 
 	memblock_x86_reserve_range(extra_start, extra_start + size, "XEN EXTRA");
 
-	xen_extra_mem_size += size;
+	xen_extra_mem[0].size += size;
 
 	xen_max_p2m_pfn = PFN_DOWN(extra_start + size);
 
@@ -242,7 +242,7 @@ char * __init xen_memory_setup(void)
 
 	memcpy(map_raw, map, sizeof(map));
 	e820.nr_map = 0;
-	xen_extra_mem_start = mem_end;
+	xen_extra_mem[0].start = mem_end;
 	for (i = 0; i < memmap.nr_entries; i++) {
 		unsigned long long end;
 
@@ -270,8 +270,8 @@ char * __init xen_memory_setup(void)
 				e820_add_region(end, delta, E820_UNUSABLE);
 		}
 
-		if (map[i].size > 0 && end > xen_extra_mem_start)
-			xen_extra_mem_start = end;
+		if (map[i].size > 0 && end > xen_extra_mem[0].start)
+			xen_extra_mem[0].start = end;
 
 		/* Add region if any remains */
 		if (map[i].size > 0)
@@ -279,10 +279,10 @@ char * __init xen_memory_setup(void)
 	}
 	/* Align the balloon area so that max_low_pfn does not get set
 	 * to be at the _end_ of the PCI gap at the far end (fee01000).
-	 * Note that xen_extra_mem_start gets set in the loop above to be
-	 * past the last E820 region. */
-	if (xen_initial_domain() && (xen_extra_mem_start < (1ULL<<32)))
-		xen_extra_mem_start = (1ULL<<32);
+	 * Note that the start of balloon area gets set in the loop above
+	 * to be past the last E820 region. */
+	if (xen_initial_domain() && (xen_extra_mem[0].start < (1ULL<<32)))
+		xen_extra_mem[0].start = (1ULL<<32);
 
 	/*
 	 * In domU, the ISA region is normal, usable memory, but we
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 9efb993..fc43b53 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -555,11 +555,32 @@ void free_xenballooned_pages(int nr_pages, struct page** pages)
 }
 EXPORT_SYMBOL(free_xenballooned_pages);
 
-static int __init balloon_init(void)
+static void __init balloon_add_region(unsigned long start_pfn,
+				      unsigned long pages)
 {
 	unsigned long pfn, extra_pfn_end;
 	struct page *page;
 
+	/*
+	 * If the amount of usable memory has been limited (e.g., with
+	 * the 'mem' command line parameter), don't add pages beyond
+	 * this limit.
+	 */
+	extra_pfn_end = min(max_pfn, start_pfn + pages);
+
+	for (pfn = start_pfn; pfn < extra_pfn_end; pfn++) {
+		page = pfn_to_page(pfn);
+		/* totalram_pages and totalhigh_pages do not
+		   include the boot-time balloon extension, so
+		   don't subtract from it. */
+		__balloon_append(page);
+	}
+}
+
+static int __init balloon_init(void)
+{
+	int i;
+
 	if (!xen_domain())
 		return -ENODEV;
 
@@ -587,23 +608,12 @@ static int __init balloon_init(void)
 
 	/*
 	 * Initialize the balloon with pages from the extra memory
-	 * region (see arch/x86/xen/setup.c).
-	 *
-	 * If the amount of usable memory has been limited (e.g., with
-	 * the 'mem' command line parameter), don't add pages beyond
-	 * this limit.
+	 * regions (see arch/x86/xen/setup.c).
 	 */
-	extra_pfn_end = min(max_pfn,
-			    (unsigned long)PFN_DOWN(xen_extra_mem_start
-						    + xen_extra_mem_size));
-	for (pfn = PFN_UP(xen_extra_mem_start);
-	     pfn < extra_pfn_end;
-	     pfn++) {
-		page = pfn_to_page(pfn);
-		/* totalram_pages and totalhigh_pages do not include the boot-time
-		   balloon extension, so don't subtract from it. */
-		__balloon_append(page);
-	}
+	for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++)
+		if (xen_extra_mem[i].size)
+			balloon_add_region(PFN_UP(xen_extra_mem[i].start),
+					   PFN_DOWN(xen_extra_mem[i].size));
 
 	return 0;
 }
diff --git a/include/xen/page.h b/include/xen/page.h
index 92b61f8..12765b6 100644
--- a/include/xen/page.h
+++ b/include/xen/page.h
@@ -3,7 +3,15 @@
 
 #include <asm/xen/page.h>
 
-extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
+struct xen_memory_region {
+	phys_addr_t start;
+	phys_addr_t size;
+};
+
+#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820MAX */
+
+extern __initdata
+struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];
 
 extern unsigned long xen_released_pages;
 
-- 
1.7.2.5

[PATCH 6/7] xen: allow extra memory to be in multiple regions

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

Allow the extra memory (used by the balloon driver) to be in multiple
regions (typically two regions, one for low memory and one for high
memory).  This allows the balloon driver to increase the number of
available low pages (if the initial number if pages is small).

As a side effect, the algorithm for building the e820 memory map is
simpler and more obviously correct as the map supplied by the
hypervisor is (almost) used as is (in particular, all reserved regions
and gaps are preserved).  Only RAM regions are altered and RAM regions
above max_pfn + extra_pages are marked as unused (the region is split
in two if necessary).

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c |  173 ++++++++++++++++++++++----------------------------
 1 files changed, 77 insertions(+), 96 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 0c8e974..6433371 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -54,26 +54,32 @@ unsigned long xen_released_pages;
  */
 #define EXTRA_MEM_RATIO		(10)
 
-static void __init xen_add_extra_mem(unsigned long pages)
+static void __init xen_add_extra_mem(u64 start, u64 size)
 {
 	unsigned long pfn;
+	int i;
 
-	u64 size = (u64)pages * PAGE_SIZE;
-	u64 extra_start = xen_extra_mem[0].start + xen_extra_mem[0].size;
-
-	if (!pages)
-		return;
-
-	e820_add_region(extra_start, size, E820_RAM);
-	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
-
-	memblock_x86_reserve_range(extra_start, extra_start + size, "XEN EXTRA");
+	for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
+		/* Add new region. */
+		if (xen_extra_mem[i].size == 0) {
+			xen_extra_mem[i].start = start;
+			xen_extra_mem[i].size  = size;
+			break;
+		}
+		/* Append to existing region. */
+		if (xen_extra_mem[i].start + xen_extra_mem[i].size == start) {
+			xen_extra_mem[i].size += size;
+			break;
+		}
+	}
+	if (i == XEN_EXTRA_MEM_MAX_REGIONS)
+		printk(KERN_WARNING "Warning: not enough extra memory regions\n");
 
-	xen_extra_mem[0].size += size;
+	memblock_x86_reserve_range(start, start + size, "XEN EXTRA");
 
-	xen_max_p2m_pfn = PFN_DOWN(extra_start + size);
+	xen_max_p2m_pfn = PFN_DOWN(start + size);
 
-	for (pfn = PFN_DOWN(extra_start); pfn <= xen_max_p2m_pfn; pfn++)
+	for (pfn = PFN_DOWN(start); pfn <= xen_max_p2m_pfn; pfn++)
 		__set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
 }
 
@@ -120,8 +126,8 @@ static unsigned long __init xen_release_chunk(phys_addr_t start_addr,
 	return len;
 }
 
-static unsigned long __init xen_return_unused_memory(unsigned long max_pfn,
-						     const struct e820map *e820)
+static unsigned long __init xen_return_unused_memory(
+	unsigned long max_pfn, const struct e820entry *map, int nr_map)
 {
 	phys_addr_t max_addr = PFN_PHYS(max_pfn);
 	phys_addr_t last_end = ISA_END_ADDRESS;
@@ -129,13 +135,13 @@ static unsigned long __init xen_return_unused_memory(unsigned long max_pfn,
 	int i;
 
 	/* Free any unused memory above the low 1Mbyte. */
-	for (i = 0; i < e820->nr_map && last_end < max_addr; i++) {
-		phys_addr_t end = e820->map[i].addr;
+	for (i = 0; i < nr_map && last_end < max_addr; i++) {
+		phys_addr_t end = map[i].addr;
 		end = min(max_addr, end);
 
 		if (last_end < end)
 			released += xen_release_chunk(last_end, end);
-		last_end = max(last_end, e820->map[i].addr + e820->map[i].size);
+		last_end = max(last_end, map[i].addr + map[i].size);
 	}
 
 	if (last_end < max_addr)
@@ -206,14 +212,13 @@ static unsigned long __init xen_get_max_pages(void)
 char * __init xen_memory_setup(void)
 {
 	static struct e820entry map[E820MAX] __initdata;
-	static struct e820entry map_raw[E820MAX] __initdata;
 
 	unsigned long max_pfn = xen_start_info->nr_pages;
 	unsigned long long mem_end;
 	int rc;
 	struct xen_memory_map memmap;
+	unsigned long max_pages;
 	unsigned long extra_pages = 0;
-	unsigned long extra_limit;
 	unsigned long identity_pages = 0;
 	int i;
 	int op;
@@ -240,49 +245,59 @@ char * __init xen_memory_setup(void)
 	}
 	BUG_ON(rc);
 
-	memcpy(map_raw, map, sizeof(map));
-	e820.nr_map = 0;
-	xen_extra_mem[0].start = mem_end;
-	for (i = 0; i < memmap.nr_entries; i++) {
-		unsigned long long end;
-
-		/* Guard against non-page aligned E820 entries. */
-		if (map[i].type == E820_RAM)
-			map[i].size -= (map[i].size + map[i].addr) % PAGE_SIZE;
-
-		end = map[i].addr + map[i].size;
-		if (map[i].type == E820_RAM && end > mem_end) {
-			/* RAM off the end - may be partially included */
-			u64 delta = min(map[i].size, end - mem_end);
-
-			map[i].size -= delta;
-			end -= delta;
-
-			extra_pages += PFN_DOWN(delta);
-			/*
-			 * Set RAM below 4GB that is not for us to be unusable.
-			 * This prevents "System RAM" address space from being
-			 * used as potential resource for I/O address (happens
-			 * when 'allocate_resource' is called).
-			 */
-			if (delta &&
-				(xen_initial_domain() && end < 0x100000000ULL))
-				e820_add_region(end, delta, E820_UNUSABLE);
+	/* Make sure the Xen-supplied memory map is well-ordered. */
+	sanitize_e820_map(map, memmap.nr_entries, &memmap.nr_entries);
+
+	max_pages = xen_get_max_pages();
+	if (max_pages > max_pfn)
+		extra_pages += max_pages - max_pfn;
+
+	xen_released_pages = xen_return_unused_memory(max_pfn, map,
+						      memmap.nr_entries);
+	extra_pages += xen_released_pages;
+
+	/*
+	 * Clamp the amount of extra memory to a EXTRA_MEM_RATIO
+	 * factor the base size.  On non-highmem systems, the base
+	 * size is the full initial memory allocation; on highmem it
+	 * is limited to the max size of lowmem, so that it doesn't
+	 * get completely filled.
+	 *
+	 * In principle there could be a problem in lowmem systems if
+	 * the initial memory is also very large with respect to
+	 * lowmem, but we won't try to deal with that here.
+	 */
+	extra_pages = min(EXTRA_MEM_RATIO * min(max_pfn, PFN_DOWN(MAXMEM)),
+			  extra_pages);
+
+	i = 0;
+	while (i < memmap.nr_entries) {
+		u64 addr = map[i].addr;
+		u64 size = map[i].size;
+		u32 type = map[i].type;
+
+		if (type == E820_RAM) {
+			/* RAM regions must be page aligned. */
+			size -= (addr + size) % PAGE_SIZE;
+			addr = PAGE_ALIGN(addr);
+
+			if (addr < mem_end) {
+				size = min(size, mem_end - addr);
+			} else if (extra_pages) {
+				size = min(size, (u64)extra_pages * PAGE_SIZE);
+				extra_pages -= size / PAGE_SIZE;
+				xen_add_extra_mem(addr, size);
+			} else
+				type = E820_UNUSABLE;
 		}
 
-		if (map[i].size > 0 && end > xen_extra_mem[0].start)
-			xen_extra_mem[0].start = end;
+		e820_add_region(addr, size, type);
 
-		/* Add region if any remains */
-		if (map[i].size > 0)
-			e820_add_region(map[i].addr, map[i].size, map[i].type);
+		map[i].addr += size;
+		map[i].size -= size;
+		if (map[i].size == 0)
+			i++;
 	}
-	/* Align the balloon area so that max_low_pfn does not get set
-	 * to be at the _end_ of the PCI gap at the far end (fee01000).
-	 * Note that the start of balloon area gets set in the loop above
-	 * to be past the last E820 region. */
-	if (xen_initial_domain() && (xen_extra_mem[0].start < (1ULL<<32)))
-		xen_extra_mem[0].start = (1ULL<<32);
 
 	/*
 	 * In domU, the ISA region is normal, usable memory, but we
@@ -308,45 +323,11 @@ char * __init xen_memory_setup(void)
 
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 
-	extra_limit = xen_get_max_pages();
-	if (max_pfn + extra_pages > extra_limit) {
-		if (extra_limit > max_pfn)
-			extra_pages = extra_limit - max_pfn;
-		else
-			extra_pages = 0;
-	}
-
-	xen_released_pages = xen_return_unused_memory(xen_start_info->nr_pages,
-						      &e820);
-	extra_pages += xen_released_pages;
-
-	/*
-	 * Clamp the amount of extra memory to a EXTRA_MEM_RATIO
-	 * factor the base size.  On non-highmem systems, the base
-	 * size is the full initial memory allocation; on highmem it
-	 * is limited to the max size of lowmem, so that it doesn't
-	 * get completely filled.
-	 *
-	 * In principle there could be a problem in lowmem systems if
-	 * the initial memory is also very large with respect to
-	 * lowmem, but we won't try to deal with that here.
-	 */
-	extra_limit = min(EXTRA_MEM_RATIO * min(max_pfn, PFN_DOWN(MAXMEM)),
-			  max_pfn + extra_pages);
-
-	if (extra_limit >= max_pfn)
-		extra_pages = extra_limit - max_pfn;
-	else
-		extra_pages = 0;
-
-	xen_add_extra_mem(extra_pages);
-
 	/*
 	 * Set P2M for all non-RAM pages and E820 gaps to be identity
-	 * type PFNs. We supply it with the non-sanitized version
-	 * of the E820.
+	 * type PFNs.
 	 */
-	identity_pages = xen_set_identity(map_raw, memmap.nr_entries);
+	identity_pages = xen_set_identity(e820.map, e820.nr_map);
 	printk(KERN_INFO "Set %ld page(s) to 1-1 mapping.\n", identity_pages);
 	return "Xen";
 }
-- 
1.7.2.5

[PATCH 7/7] xen: release all pages within 1-1 p2m mappings

[David Vrabel]

From: David Vrabel <david.vrabel@citrix.com>

In xen_memory_setup() all reserved regions and gaps are set to an
identity (1-1) p2m mapping.  If an available page has a PFN within one
of these 1-1 mappings it will become inaccessible (as it MFN is lost)
so release them before setting up the mapping.

This can make an additional 256 MiB or more of RAM available
(depending on the size of the reserved regions in the memory map) if
the initial pages overlap with reserved regions.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/xen/setup.c |  100 ++++++++++++++++---------------------------------
 1 files changed, 33 insertions(+), 67 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 6433371..986661b 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -126,72 +126,44 @@ static unsigned long __init xen_release_chunk(phys_addr_t start_addr,
 	return len;
 }
 
-static unsigned long __init xen_return_unused_memory(
-	unsigned long max_pfn, const struct e820entry *map, int nr_map)
+static unsigned long __init xen_set_identity_and_release(
+	const struct e820entry *list, size_t map_size, unsigned long nr_pages)
 {
-	phys_addr_t max_addr = PFN_PHYS(max_pfn);
-	phys_addr_t last_end = ISA_END_ADDRESS;
+	phys_addr_t avail_end = PFN_PHYS(nr_pages);
+	phys_addr_t last_end = 0;
 	unsigned long released = 0;
-	int i;
-
-	/* Free any unused memory above the low 1Mbyte. */
-	for (i = 0; i < nr_map && last_end < max_addr; i++) {
-		phys_addr_t end = map[i].addr;
-		end = min(max_addr, end);
-
-		if (last_end < end)
-			released += xen_release_chunk(last_end, end);
-		last_end = max(last_end, map[i].addr + map[i].size);
-	}
-
-	if (last_end < max_addr)
-		released += xen_release_chunk(last_end, max_addr);
-
-	printk(KERN_INFO "released %lu pages of unused memory\n", released);
-	return released;
-}
-
-static unsigned long __init xen_set_identity(const struct e820entry *list,
-					     ssize_t map_size)
-{
-	phys_addr_t last = xen_initial_domain() ? 0 : ISA_END_ADDRESS;
-	phys_addr_t start_pci = last;
-	const struct e820entry *entry;
 	unsigned long identity = 0;
+	const struct e820entry *entry;
 	int i;
 
+	/*
+	 * For each memory region consider whether to release and map
+	 * the region and the preceeding gap (if any). If the region
+	 * is RAM, only the gap is released and mapped.
+	 */
 	for (i = 0, entry = list; i < map_size; i++, entry++) {
-		phys_addr_t start = entry->addr;
-		phys_addr_t end = start + entry->size;
+		phys_addr_t begin = last_end;
+		phys_addr_t end = entry->addr + entry->size;
 
-		if (start < last)
-			start = last;
+		last_end = end;
 
-		if (end <= start)
-			continue;
-
-		/* Skip over the 1MB region. */
-		if (last > end)
-			continue;
+		if (entry->type == E820_RAM || entry->type == E820_UNUSABLE)
+			end = entry->addr;
 
-		if ((entry->type == E820_RAM) || (entry->type == E820_UNUSABLE)) {
-			if (start > start_pci)
-				identity += set_phys_range_identity(
-						PFN_UP(start_pci), PFN_DOWN(start));
+		if (begin < end) {
+			if (begin < avail_end)
+				released += xen_release_chunk(
+					begin, min(end, avail_end));
 
-			/* Without saving 'last' we would gooble RAM too
-			 * at the end of the loop. */
-			last = end;
-			start_pci = end;
-			continue;
+			identity += set_phys_range_identity(
+				PFN_UP(begin), PFN_DOWN(end));
 		}
-		start_pci = min(start, start_pci);
-		last = end;
 	}
-	if (last > start_pci)
-		identity += set_phys_range_identity(
-					PFN_UP(start_pci), PFN_DOWN(last));
-	return identity;
+
+	printk(KERN_INFO "Released %lu pages of unused memory\n", released);
+	printk(KERN_INFO "Set %ld page(s) to 1-1 mapping\n", identity);
+
+	return released;
 }
 
 static unsigned long __init xen_get_max_pages(void)
@@ -219,7 +191,6 @@ char * __init xen_memory_setup(void)
 	struct xen_memory_map memmap;
 	unsigned long max_pages;
 	unsigned long extra_pages = 0;
-	unsigned long identity_pages = 0;
 	int i;
 	int op;
 
@@ -252,8 +223,13 @@ char * __init xen_memory_setup(void)
 	if (max_pages > max_pfn)
 		extra_pages += max_pages - max_pfn;
 
-	xen_released_pages = xen_return_unused_memory(max_pfn, map,
-						      memmap.nr_entries);
+	/*
+	 * Set P2M for all non-RAM pages and E820 gaps to be identity
+	 * type PFNs.  Any RAM pages that would be made inaccesible by
+	 * this are first released.
+	 */
+	xen_released_pages = xen_set_identity_and_release(
+		map, memmap.nr_entries, max_pfn);
 	extra_pages += xen_released_pages;
 
 	/*
@@ -303,10 +279,6 @@ char * __init xen_memory_setup(void)
 	 * In domU, the ISA region is normal, usable memory, but we
 	 * reserve ISA memory anyway because too many things poke
 	 * about in there.
-	 *
-	 * In Dom0, the host E820 information can leave gaps in the
-	 * ISA range, which would cause us to release those pages.  To
-	 * avoid this, we unconditionally reserve them here.
 	 */
 	e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS,
 			E820_RESERVED);
@@ -323,12 +295,6 @@ char * __init xen_memory_setup(void)
 
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 
-	/*
-	 * Set P2M for all non-RAM pages and E820 gaps to be identity
-	 * type PFNs.
-	 */
-	identity_pages = xen_set_identity(e820.map, e820.nr_map);
-	printk(KERN_INFO "Set %ld page(s) to 1-1 mapping.\n", identity_pages);
 	return "Xen";
 }
 
-- 
1.7.2.5

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: David Vrabel [mailto:david.vrabel@citrix.com]
> Sent: Thursday, September 15, 2011 6:29 AM
> To: xen-devel@lists.xensource.com
> Cc: Konrad Rzeszutek Wilk
> Subject: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> 
> This set of patches fixes some bugs in the memory initialization under
> Xen and in Xen's memory balloon driver.  They can make 100s of MB of
> additional RAM available (depending on the system/configuration).
> 
> Patch 1 is already applied.
> 
> Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
> with patch 1 considered for 3.0 stable).
> 
> Patch 3 is a bug fix and should be queued for 3.1 and possibly
> queued for the 3.0 stable tree.
> 
> Patches 5 & 6 increase the amount of low memory in 32 bit domains
> started with < 1 GiB of RAM.  Please queue for 3.2
> 
> Patch 7 releases all pages in the initial allocation with PFNs that
> lie within a 1-1 mapping.  This seems correct to me as I think that
> once the 1-1 mapping is set the MFN of the original page is lost so
> it's no longer accessible by the kernel (and it cannot be used by
> another domain

Hi David --

Thanks for your patches!  I am looking at a memory capacity/ballooning
weirdness that I hoped your patchset might fix, but so far it has not.
I'm wondering if there was an earlier fix that you are building upon
and that I am missing.

My problem occurs in a PV domU with an upstream-variant kernel based
on 3.0.5.  The problem is that the total amount of memory as seen
from inside the guest is always substantially less than the amount
of memory seen from outside the guest.  The difference seems to
be fixed within a given boot, but assigning a different vm.cfg mem=
changes the amount.  (For example, the difference D is about 18MB on
a mem=128 boot and about 36MB on a mem=1024 boot.)

Part B of the problem (and the one most important to me) is that
setting /sys/devices/system/xen_memory/xen_memory0/target_kb
to X results in a MemTotal inside the domU (as observed by
"head -1 /proc/meminfo") of X-D.  This can be particularly painful
when X is aggressively small as X-D may result in OOMs.
To use kernel function/variable names (and I observed this with
some debugging code), when balloon_set_new_target(X) is called
totalram_pages gets driven to X-D.

I am using xm, but I don't think this is a toolchain problem because
the problem can be provoked and observed entirely within the guest...
though I suppose it is possible that that the initial "mem=" is the
origin of the problem and the balloon driver just perpetuates
the initial difference.  (I tried xl... same problem... my
Xen/toolset version is 4.1.2-rc1-pre cset 23102)

The descriptions in your patchset sound exactly as if you are
attacking the same problem, but I'm not seeing any improved
result.  Any thoughts or ideas?

Thanks,
Dan

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: Dan Magenheimer
> Sent: Tuesday, September 20, 2011 10:58 AM
> To: David Vrabel; xen-devel@lists.xensource.com
> Cc: Konrad Wilk
> Subject: RE: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> 
> > From: David Vrabel [mailto:david.vrabel@citrix.com]
> > Sent: Thursday, September 15, 2011 6:29 AM
> > To: xen-devel@lists.xensource.com
> > Cc: Konrad Rzeszutek Wilk
> > Subject: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> >
> > This set of patches fixes some bugs in the memory initialization under
> > Xen and in Xen's memory balloon driver.  They can make 100s of MB of
> > additional RAM available (depending on the system/configuration).
> 
> Hi David --
> 
> Thanks for your patches!  I am looking at a memory capacity/ballooning
> weirdness that I hoped your patchset might fix, but so far it has not.
> I'm wondering if there was an earlier fix that you are building upon
> and that I am missing.
> 
> My problem occurs in a PV domU with an upstream-variant kernel based
> on 3.0.5.  The problem is that the total amount of memory as seen
> from inside the guest is always substantially less than the amount
> of memory seen from outside the guest.  The difference seems to
> be fixed within a given boot, but assigning a different vm.cfg mem=
> changes the amount.  (For example, the difference D is about 18MB on
> a mem=128 boot and about 36MB on a mem=1024 boot.)
> 
> Part B of the problem (and the one most important to me) is that
> setting /sys/devices/system/xen_memory/xen_memory0/target_kb
> to X results in a MemTotal inside the domU (as observed by
> "head -1 /proc/meminfo") of X-D.  This can be particularly painful
> when X is aggressively small as X-D may result in OOMs.
> To use kernel function/variable names (and I observed this with
> some debugging code), when balloon_set_new_target(X) is called
> totalram_pages gets driven to X-D.
> 
> I am using xm, but I don't think this is a toolchain problem because
> the problem can be provoked and observed entirely within the guest...
> though I suppose it is possible that that the initial "mem=" is the
> origin of the problem and the balloon driver just perpetuates
> the initial difference.  (I tried xl... same problem... my
> Xen/toolset version is 4.1.2-rc1-pre cset 23102)
> 
> The descriptions in your patchset sound exactly as if you are
> attacking the same problem, but I'm not seeing any improved
> result.  Any thoughts or ideas?

Hi David (and Konrad) --

Don't know if you are looking at this or not (or if your patchset
was intended to fix this problem or not).  Looking into Part B
of the problem, it appears that in balloon_init() the initial
value of balloon_stats.current_pages may be set incorrectly.
I'm finding that (for a PV domain), both nr_pages and max_pfn
match mem=, but totalram_pages is substantially less.
Current_pages should never be higher than the actual number
of pages of RAM seen by the kernel, should it?

By changing max_pfn to totalram_pages in the initialization of
balloon_stats.current_pages in balloon_init(), my problem goes
away... almost.  With that fix, setting the balloon target to NkB
results in totalram_pages (as seen from "head -1 /proc/meminfo")
going to (N+6092)kB.  The value 6092 appears to be fixed
regardless of mem= and the fact that the result is off by
6092kB is annoying but, since it is higher rather than lower
and it is fixed, it is not nearly as dangerous IMHO.

Since I'm not as sure of the RAM-ifications (pun intended) of
this change, I'd appreciate any comments you might have.

Also, this doesn't fix the large difference between MEM(K)
reported by the domain in xentop (which matches mem=) and
totalram_pages but, though also annoying, that's not such
a big problem IMHO.  I'm guessing this may be space taken
for PV pagetables or something like that, though the amount
of RAM that "disappears" on a small-RAM guest (e.g. mem=128)
is very high (e.g. ~18MB).  But for my purposes (selfballooning),
this doesn't matter (much) so I don't plan to pursue this
right now.

Thanks for any feedback!
Dan

P.S. I also haven't looked at the HVM code in balloon_init.

Re: xen: memory initialization/balloon fixes (#3)

[David Vrabel]

On 20/09/11 17:57, Dan Magenheimer wrote:
>
> Thanks for your patches!  I am looking at a memory capacity/ballooning
> weirdness that I hoped your patchset might fix, but so far it has not.
> I'm wondering if there was an earlier fix that you are building upon
> and that I am missing.
> 
> My problem occurs in a PV domU with an upstream-variant kernel based
> on 3.0.5.  The problem is that the total amount of memory as seen
> from inside the guest is always substantially less than the amount
> of memory seen from outside the guest.  The difference seems to
> be fixed within a given boot, but assigning a different vm.cfg mem=
> changes the amount.  (For example, the difference D is about 18MB on
> a mem=128 boot and about 36MB on a mem=1024 boot.)

I don't see the problem?

The MemTotal value /proc/meminfo doesn't include some pages reserved by
the kernel which is why it's less than the maximum reservation of the
domain.

> Part B of the problem (and the one most important to me) is that
> setting /sys/devices/system/xen_memory/xen_memory0/target_kb
> to X results in a MemTotal inside the domU (as observed by
> "head -1 /proc/meminfo") of X-D.  This can be particularly painful
> when X is aggressively small as X-D may result in OOMs.
> To use kernel function/variable names (and I observed this with
> some debugging code), when balloon_set_new_target(X) is called
> totalram_pages gets driven to X-D.

Again, this looks like the correct behavior to me.

David

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: David Vrabel [mailto:david.vrabel@citrix.com]
> Sent: Thursday, September 22, 2011 6:32 AM
> To: Dan Magenheimer
> Cc: xen-devel@lists.xensource.com; Konrad Wilk
> Subject: Re: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> 
> On 20/09/11 17:57, Dan Magenheimer wrote:
> >
> > Thanks for your patches!  I am looking at a memory capacity/ballooning
> > weirdness that I hoped your patchset might fix, but so far it has not.
> > I'm wondering if there was an earlier fix that you are building upon
> > and that I am missing.
> >
> > My problem occurs in a PV domU with an upstream-variant kernel based
> > on 3.0.5.  The problem is that the total amount of memory as seen
> > from inside the guest is always substantially less than the amount
> > of memory seen from outside the guest.  The difference seems to
> > be fixed within a given boot, but assigning a different vm.cfg mem=
> > changes the amount.  (For example, the difference D is about 18MB on
> > a mem=128 boot and about 36MB on a mem=1024 boot.)
> 
> I don't see the problem?

Hi David --

Sorry, just to clarify, are you saying you are seeing the same
behavior and don't consider it a problem, or that you are not
seeing the same difference?

> The MemTotal value /proc/meminfo doesn't include some pages reserved by
> the kernel which is why it's less than the maximum reservation of the
> domain.

I'm aware of that... "some" has been a fixed size of a few megabytes
in Xen for a long time.  I am seeing 30-60MB or more.

If you are never seeing a difference more than a few MB, maybe
I've misapplied your patches (as they didn't apply cleanly and
I had to do some manual patching).
 
> > Part B of the problem (and the one most important to me) is that
> > setting /sys/devices/system/xen_memory/xen_memory0/target_kb
> > to X results in a MemTotal inside the domU (as observed by
> > "head -1 /proc/meminfo") of X-D.  This can be particularly painful
> > when X is aggressively small as X-D may result in OOMs.
> > To use kernel function/variable names (and I observed this with
> > some debugging code), when balloon_set_new_target(X) is called
> > totalram_pages gets driven to X-D.
> 
> Again, this looks like the correct behavior to me.

Hmmm... so if a user (or automated tool) uses the Xen-defined
API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
to use the Xen balloon driver to attempt to reduce memory usage
to 100MB, and the Xen balloon driver instead reduces it to
some random number somewhere between 40MB and 90MB, which
may or may not cause OOMs, you consider this correct behavior?

(Cc'ing a couple of ballooning old-timers to ensure I am not
misunderstanding the intended API.)

Thanks,
Dan

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: Dan Magenheimer
> Subject: RE: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> 
> > From: David Vrabel [mailto:david.vrabel@citrix.com]
> > Subject: Re: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> >
> > On 20/09/11 17:57, Dan Magenheimer wrote:
> > >
> > >
> > > My problem occurs in a PV domU with an upstream-variant kernel based
> > > on 3.0.5.  The problem is that the total amount of memory as seen
> > > from inside the guest is always substantially less than the amount
> > > of memory seen from outside the guest.  The difference seems to
> > > be fixed within a given boot, but assigning a different vm.cfg mem=
> > > changes the amount.  (For example, the difference D is about 18MB on
> > > a mem=128 boot and about 36MB on a mem=1024 boot.)
> >
> > I don't see the problem?
> 
> Hi David --
> 
> Sorry, just to clarify, are you saying you are seeing the same
> behavior and don't consider it a problem, or that you are not
> seeing the same difference?
>
> > The MemTotal value /proc/meminfo doesn't include some pages reserved by
> > the kernel which is why it's less than the maximum reservation of the
> > domain.
> 
> I'm aware of that... "some" has been a fixed size of a few megabytes
> in Xen for a long time.  I am seeing 30-60MB or more.

Never mind on this part.  After further debugging, I can see
that this difference is due to normal uses of memory by the
kernel for XEN PAGETABLES and RAMDISK etc.  It's unfortunate
that the difference is so large, but I guess that's in part due
to the desire to use the same kernel binary for native and
virtualized.  I don't remember it being nearly so high for
older PV kernels, but I guess it's progress! :-}

> > > Part B of the problem (and the one most important to me) is that
> > > setting /sys/devices/system/xen_memory/xen_memory0/target_kb
> > > to X results in a MemTotal inside the domU (as observed by
> > > "head -1 /proc/meminfo") of X-D.  This can be particularly painful
> > > when X is aggressively small as X-D may result in OOMs.
> > > To use kernel function/variable names (and I observed this with
> > > some debugging code), when balloon_set_new_target(X) is called
> > > totalram_pages gets driven to X-D.
> >
> > Again, this looks like the correct behavior to me.
> 
> Hmmm... so if a user (or automated tool) uses the Xen-defined
> API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
> to use the Xen balloon driver to attempt to reduce memory usage
> to 100MB, and the Xen balloon driver instead reduces it to
> some random number somewhere between 40MB and 90MB, which
> may or may not cause OOMs, you consider this correct behavior?

I still think this is a bug but apparently orthogonal to
your patchset.  So sorry to bother you.

Dan

Re: xen: memory initialization/balloon fixes (#3)

[Jeremy Fitzhardinge]

On 09/22/2011 03:34 PM, Dan Magenheimer wrote:
>> I'm aware of that... "some" has been a fixed size of a few megabytes
>> in Xen for a long time.  I am seeing 30-60MB or more.
> Never mind on this part.  After further debugging, I can see
> that this difference is due to normal uses of memory by the
> kernel for XEN PAGETABLES and RAMDISK etc.  It's unfortunate
> that the difference is so large, but I guess that's in part due
> to the desire to use the same kernel binary for native and
> virtualized.  I don't remember it being nearly so high for
> older PV kernels, but I guess it's progress! :-}

I don't think the Xen parts allocate/reserves lots of memory
unnecessarily, so it shouldn't be too different from the 2.6.18-xen
kernels.  They do reserve various chunks of memory, but for things like
RAMDISK I think they get released again (and anyway, I don't think
that's going to be anywhere near 30MB, let alone 60).  I'm not very
confident in those /proc/meminfo numbers - they may count memory as
"reserved" if its in a reserved region even if the pages themselves have
been released to the kernel pool.

>>>> Part B of the problem (and the one most important to me) is that
>>>> setting /sys/devices/system/xen_memory/xen_memory0/target_kb
>>>> to X results in a MemTotal inside the domU (as observed by
>>>> "head -1 /proc/meminfo") of X-D.  This can be particularly painful
>>>> when X is aggressively small as X-D may result in OOMs.
>>>> To use kernel function/variable names (and I observed this with
>>>> some debugging code), when balloon_set_new_target(X) is called
>>>> totalram_pages gets driven to X-D.
>>> Again, this looks like the correct behavior to me.
>> Hmmm... so if a user (or automated tool) uses the Xen-defined
>> API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
>> to use the Xen balloon driver to attempt to reduce memory usage
>> to 100MB, and the Xen balloon driver instead reduces it to
>> some random number somewhere between 40MB and 90MB, which
>> may or may not cause OOMs, you consider this correct behavior?
> I still think this is a bug but apparently orthogonal to
> your patchset.  So sorry to bother you.

If you ask for 100MB, it should never try to make the domain smaller
than that; if it does, it suggests the number is being misparsed or
something.

    J

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: Jeremy Fitzhardinge [mailto:jeremy@goop.org]
> 
> On 09/22/2011 03:34 PM, Dan Magenheimer wrote:
> >> I'm aware of that... "some" has been a fixed size of a few megabytes
> >> in Xen for a long time.  I am seeing 30-60MB or more.
> > Never mind on this part.  After further debugging, I can see
> > that this difference is due to normal uses of memory by the
> > kernel for XEN PAGETABLES and RAMDISK etc.  It's unfortunate
> > that the difference is so large, but I guess that's in part due
> > to the desire to use the same kernel binary for native and
> > virtualized.  I don't remember it being nearly so high for
> > older PV kernels, but I guess it's progress! :-}
> 
> I don't think the Xen parts allocate/reserves lots of memory
> unnecessarily, so it shouldn't be too different from the 2.6.18-xen
> kernels.  They do reserve various chunks of memory, but for things like
> RAMDISK I think they get released again (and anyway, I don't think
> that's going to be anywhere near 30MB, let alone 60).  I'm not very
> confident in those /proc/meminfo numbers - they may count memory as
> "reserved" if its in a reserved region even if the pages themselves have
> been released to the kernel pool.

No, the first line of /proc/meminfo is precisely "totalram_pages".
 
> >>>> Part B of the problem (and the one most important to me) is that
> >>>> setting /sys/devices/system/xen_memory/xen_memory0/target_kb
> >>>> to X results in a MemTotal inside the domU (as observed by
> >>>> "head -1 /proc/meminfo") of X-D.  This can be particularly painful
> >>>> when X is aggressively small as X-D may result in OOMs.
> >>>> To use kernel function/variable names (and I observed this with
> >>>> some debugging code), when balloon_set_new_target(X) is called
> >>>> totalram_pages gets driven to X-D.
> >>> Again, this looks like the correct behavior to me.
> >> Hmmm... so if a user (or automated tool) uses the Xen-defined
> >> API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
> >> to use the Xen balloon driver to attempt to reduce memory usage
> >> to 100MB, and the Xen balloon driver instead reduces it to
> >> some random number somewhere between 40MB and 90MB, which
> >> may or may not cause OOMs, you consider this correct behavior?
> > I still think this is a bug but apparently orthogonal to
> > your patchset.  So sorry to bother you.
> 
> If you ask for 100MB, it should never try to make the domain smaller
> than that; if it does, it suggests the number is being misparsed or
> something.

OK then balloon_stats.current_pages can never be larger than totalram_pages.
Which means that balloon_stats.current_pages must always grow
and shrink when totalram_pages does (which is true now only in
the balloon driver code).  Which means, I think:

balloon_stats.current_pages is just plain wrong!  It doesn't need to
exist!  If we replace every instance in balloon.c with totalram_pages,
I think everything just works.  Will run some tests tomorrow.

Dan

P.S. Not sure about Daniel's hotplug stuff though....

Re: xen: memory initialization/balloon fixes (#3)

[David Vrabel]

On 23/09/11 00:46, Dan Magenheimer wrote:
>> From: Jeremy Fitzhardinge [mailto:jeremy@goop.org]
>>
>> On 09/22/2011 03:34 PM, Dan Magenheimer wrote:
>>>> I'm aware of that... "some" has been a fixed size of a few megabytes
>>>> in Xen for a long time.  I am seeing 30-60MB or more.
>>> Never mind on this part.  After further debugging, I can see
>>> that this difference is due to normal uses of memory by the
>>> kernel for XEN PAGETABLES and RAMDISK etc.  It's unfortunate
>>> that the difference is so large, but I guess that's in part due
>>> to the desire to use the same kernel binary for native and
>>> virtualized.  I don't remember it being nearly so high for
>>> older PV kernels, but I guess it's progress! :-}
>>
>> I don't think the Xen parts allocate/reserves lots of memory
>> unnecessarily, so it shouldn't be too different from the 2.6.18-xen
>> kernels.  They do reserve various chunks of memory, but for things like
>> RAMDISK I think they get released again (and anyway, I don't think
>> that's going to be anywhere near 30MB, let alone 60).  I'm not very
>> confident in those /proc/meminfo numbers - they may count memory as
>> "reserved" if its in a reserved region even if the pages themselves have
>> been released to the kernel pool.
> 
> No, the first line of /proc/meminfo is precisely "totalram_pages".

I think most of the increase in reserved memory compared to classic Xen
kernels is the change to using the generic SWIOTLB.  This is up to 64 MiB.

>>>>>> Part B of the problem (and the one most important to me) is that
>>>>>> setting /sys/devices/system/xen_memory/xen_memory0/target_kb
>>>>>> to X results in a MemTotal inside the domU (as observed by
>>>>>> "head -1 /proc/meminfo") of X-D.  This can be particularly painful
>>>>>> when X is aggressively small as X-D may result in OOMs.
>>>>>> To use kernel function/variable names (and I observed this with
>>>>>> some debugging code), when balloon_set_new_target(X) is called
>>>>>> totalram_pages gets driven to X-D.
>>>>> Again, this looks like the correct behavior to me.
>>>> Hmmm... so if a user (or automated tool) uses the Xen-defined
>>>> API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
>>>> to use the Xen balloon driver to attempt to reduce memory usage
>>>> to 100MB, and the Xen balloon driver instead reduces it to
>>>> some random number somewhere between 40MB and 90MB, which
>>>> may or may not cause OOMs, you consider this correct behavior?
>>> I still think this is a bug but apparently orthogonal to
>>> your patchset.  So sorry to bother you.
>>
>> If you ask for 100MB, it should never try to make the domain smaller
>> than that; if it does, it suggests the number is being misparsed or
>> something.
> 
> OK then balloon_stats.current_pages can never be larger than totalram_pages.
> Which means that balloon_stats.current_pages must always grow
> and shrink when totalram_pages does (which is true now only in
> the balloon driver code).  Which means, I think:
> 
> balloon_stats.current_pages is just plain wrong!  It doesn't need to
> exist!  If we replace every instance in balloon.c with totalram_pages,
> I think everything just works.  Will run some tests tomorrow.

No.  balloon_stats.current_pages is the amount of pages used by the
domain from Xen's point of view (and must be equal to the amount report
by xl top).  It is not what the guest kernel thinks is the number of
usable pages.

Because totalram_pages doesn't include some reserved pages
balloon_stats.current_pages will necessarily always be greater.

If you're attempting to make the domain self-balloon I don't see why
you're even interested in the total number of pages.  Surely it's the
number of free pages that's useful?

e.g., a basic self-ballooning algorithm would be something like.

   delta = free_pages - emergency_reserve - spare
   reservation_target -= delta

Where:

free_pages is the current number of free pages

emergency_reserve is the amount of pages the kernel reserves for
satisfying important allocations when memory is low.  This is
approximately (initial_maximum_reservation / 32).

spare is some extra number of pages to provide a buffer when the memory
usage increases.

David

Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

> > No, the first line of /proc/meminfo is precisely "totalram_pages".
> 
> I think most of the increase in reserved memory compared to classic Xen
> kernels is the change to using the generic SWIOTLB.  This is up to 64 MiB.

Which should be disabled by default on domU... Well, unless your guest
has more than 4GB than it gets enabled.

RE: xen: memory initialization/balloon fixes (#3)

[Dan Magenheimer]

> From: David Vrabel [mailto:david.vrabel@citrix.com]
> Subject: Re: [Xen-devel] xen: memory initialization/balloon fixes (#3)
> 
> On 23/09/11 00:46, Dan Magenheimer wrote:
> >> From: Jeremy Fitzhardinge [mailto:jeremy@goop.org]
> >>
> >> I don't think the Xen parts allocate/reserves lots of memory
> >> unnecessarily, so it shouldn't be too different from the 2.6.18-xen
> >> kernels.  They do reserve various chunks of memory, but for things like
> >> RAMDISK I think they get released again (and anyway, I don't think
> >> that's going to be anywhere near 30MB, let alone 60).  I'm not very
> >> confident in those /proc/meminfo numbers - they may count memory as
> >> "reserved" if its in a reserved region even if the pages themselves have
> >> been released to the kernel pool.
> >
> > No, the first line of /proc/meminfo is precisely "totalram_pages".
> 
> I think most of the increase in reserved memory compared to classic Xen
> kernels is the change to using the generic SWIOTLB.  This is up to 64 MiB.

Hi David --

My data agrees with Konrad's reply.  I don't see the SWIOTLB
but am only testing with smaller guests (<2GB).

> >>>>> Again, this looks like the correct behavior to me.
> >>>> Hmmm... so if a user (or automated tool) uses the Xen-defined
> >>>> API (i.e. /sys/devices/system/xen_memory/xen_memory0/target_kb)
> >>>> to use the Xen balloon driver to attempt to reduce memory usage
> >>>> to 100MB, and the Xen balloon driver instead reduces it to
> >>>> some random number somewhere between 40MB and 90MB, which
> >>>> may or may not cause OOMs, you consider this correct behavior?
> >>> I still think this is a bug but apparently orthogonal to
> >>> your patchset.  So sorry to bother you.
> >>
> >> If you ask for 100MB, it should never try to make the domain smaller
> >> than that; if it does, it suggests the number is being misparsed or
> >> something.

(Jeremy -- No it's not getting mis-parsed... in the existing balloon
code the try-to-balloon-to-target-N code is instead ballooning to
N-D, where D is "reserved_pages+absent_pages"... and as you pointed
out, this sum gets modified after the balloon is initialized.)

> > OK then balloon_stats.current_pages can never be larger than totalram_pages.
> > Which means that balloon_stats.current_pages must always grow
> > and shrink when totalram_pages does (which is true now only in
> > the balloon driver code).  Which means, I think:
> >
> > balloon_stats.current_pages is just plain wrong!  It doesn't need to
> > exist!  If we replace every instance in balloon.c with totalram_pages,
> > I think everything just works.  Will run some tests tomorrow.
> 
> No.  balloon_stats.current_pages is the amount of pages used by the
> domain from Xen's point of view (and must be equal to the amount report
> by xl top).  It is not what the guest kernel thinks is the number of
> usable pages.

OK.  It still appears to be not always accurate to me.  Are you using
balloon_stats.current_pages via sysfs?  AFAICT, the interface used to
get the amount of domain memory (e.g. for xl top) does not use
balloon_stats.current_pages, so the only way it would be visible
outside of the balloon driver is via sysfs.  I suppose that is
part of the guest ABI now, even if it contains an unreliable value.

In any case, I can leave balloon_stats.current_pages alone in
my patch-under-development.  It is "just plain wrong" for my
purposes and for setting a balloon target, and I think still wrong
for the purpose you state, but I think I can leave unmodified the
code that updates it so as not to affect code that uses it via
sysfs.

> Because totalram_pages doesn't include some reserved pages
> balloon_stats.current_pages will necessarily always be greater.

Yep.

> If you're attempting to make the domain self-balloon I don't see why
> you're even interested in the total number of pages.  Surely it's the
> number of free pages that's useful?

No, after the kernel has been busy awhile, the number of free
pages can be quite small, because most of RAM gets used in the
page cache.  Self-ballooning (as used with tmem) is much more
aggressive than that because part of the purpose of tmem is
to act as an all-domain page cache.  If you're not familiar with
tmem, see http://oss.oracle.com/projects/tmem.

Thanks again for the feedback.  I'll cc you on my upcoming patch.

Dan

Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

On Thu, Sep 15, 2011 at 01:29:21PM +0100, David Vrabel wrote:
> This set of patches fixes some bugs in the memory initialization under
> Xen and in Xen's memory balloon driver.  They can make 100s of MB of
> additional RAM available (depending on the system/configuration).
> 
> Patch 1 is already applied.
> 
> Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
> with patch 1 considered for 3.0 stable).
> 
> Patch 3 is a bug fix and should be queued for 3.1 and possibly
> queued for the 3.0 stable tree.
> 
> Patches 5 & 6 increase the amount of low memory in 32 bit domains
> started with < 1 GiB of RAM.  Please queue for 3.2

I've queued them up and going to test them this week to make sure
there are no regressions.

> 
> Patch 7 releases all pages in the initial allocation with PFNs that
> lie within a 1-1 mapping.  This seems correct to me as I think that

The only thing I remember about this was with dmidecode doing something
fishy.. (As in, it wouldn't work when the pages under 1MB were released)
(But I can't remember the details about it, so I might be completly
wrong).

Could you please test that as well?

> once the 1-1 mapping is set the MFN of the original page is lost so
> it's no longer accessible by the kernel (and it cannot be used by
> another domain
> 
> Changes since #2:
> 
> - New patch: xen: avoid adding non-existant memory if the reservation
>   is unlimited
> - Avoid using a hypercall to get the current number of pages in the
>   ballon driver.  Apparently the hypercall won't return the right
>   value if paging is used.
> - Addresses Konrad's review comments.
> 
> David

Re: xen: memory initialization/balloon fixes (#3)

[David Vrabel]

On 21/09/11 18:11, Konrad Rzeszutek Wilk wrote:
> On Thu, Sep 15, 2011 at 01:29:21PM +0100, David Vrabel wrote:
>>
>> Patch 7 releases all pages in the initial allocation with PFNs that
>> lie within a 1-1 mapping.  This seems correct to me as I think that
> 
> The only thing I remember about this was with dmidecode doing something
> fishy.. (As in, it wouldn't work when the pages under 1MB were released)
> (But I can't remember the details about it, so I might be completly
> wrong).
> 
> Could you please test that as well?

dmidecode works on the two test boxes I had to hand.

>> once the 1-1 mapping is set the MFN of the original page is lost so
>> it's no longer accessible by the kernel (and it cannot be used by
>> another domain

David

Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

On Thu, Sep 15, 2011 at 01:29:21PM +0100, David Vrabel wrote:
> This set of patches fixes some bugs in the memory initialization under
> Xen and in Xen's memory balloon driver.  They can make 100s of MB of
> additional RAM available (depending on the system/configuration).
> 
> Patch 1 is already applied.
> 
> Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
> with patch 1 considered for 3.0 stable).
> 
> Patch 3 is a bug fix and should be queued for 3.1 and possibly
> queued for the 3.0 stable tree.
> 
> Patches 5 & 6 increase the amount of low memory in 32 bit domains
> started with < 1 GiB of RAM.  Please queue for 3.2
> 
> Patch 7 releases all pages in the initial allocation with PFNs that
> lie within a 1-1 mapping.  This seems correct to me as I think that
> once the 1-1 mapping is set the MFN of the original page is lost so
> it's no longer accessible by the kernel (and it cannot be used by
> another domain
> 
> Changes since #2:
> 
> - New patch: xen: avoid adding non-existant memory if the reservation
>   is unlimited
> - Avoid using a hypercall to get the current number of pages in the
>   ballon driver.  Apparently the hypercall won't return the right
>   value if paging is used.
> - Addresses Konrad's review comments.

They don't work on AMD boxes:

XELINUX 3.82 2009-06-09  Copyright (C) 1994-2009 H. Peter Anvin et al
Loading xen.gz... ok
Loading vmlinuz... ok
Loading initramfs.cpio.gz... ok
 __  __            _  _    _    _ _  ___   __  _____  ___  
 \ \/ /___ _ __   | || |  / |  / / |/ _ \ / /_|___ / / _ \ 
  \  // _ \ '_ \  | || |_ | |__| | | | | | '_ \ |_ \| | | |
  /  \  __/ | | | |__   _|| |__| | | |_| | (_) |__) | |_| |
 /_/\_\___|_| |_|    |_|(_)_|  |_|_|\___/ \___/____/ \___/ 
                                                           
(XEN) Xen version 4.1-110923 (konrad@dumpdata.com) (gcc version 4.4.4 20100503 (Red Hat 4.4.4-2) (GCC) ) Fri Sep 23 19:38:15 EDT 2011
(XEN) Latest ChangeSet: unavailable
(XEN) Console output is synchronous.
(XEN) Bootloader: unknown
(XEN) Command line: com1=115200,8n1 console=com1,vga guest_loglvl=all sync_console apic=debug
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 2 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 0 MBR signatures
(XEN)  Found 0 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009d800 (usable)
(XEN)  000000000009d800 - 00000000000a0000 (reserved)
(XEN)  00000000000cc000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000007fff0000 (usable)
(XEN)  000000007fff0000 - 0000000080000000 (reserved)
(XEN)  0000000080000000 - 00000000cfef0000 (usable)
(XEN)  00000000cfef0000 - 00000000cfef5000 (ACPI data)
(XEN)  00000000cfef5000 - 00000000cff7f000 (ACPI NVS)
(XEN)  00000000cff80000 - 00000000d0000000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fec00000 - 00000000fec10000 (reserved)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000fff80000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000130000000 (usable)
(XEN) ACPI: RSDP 000F79B0, 0024 (r2 PTLTD )
(XEN) ACPI: XSDT CFEF0753, 009C (r1 DELL   PE_SC3    6040000 DELL        0)
(XEN)  DELL   PE_SC3    6040000 MSFT  100000E)
(XEN) ACPI: FACS CFEF5FC0, 0040
(XEN) ACPI: TCPA CFEF3D53, 0032 (r1 Phoeni  x        6040000  TL         0)
(XEN) ACPI: SLIC CFEF3D85, 0024 (r1 DELL   PE_SC3    6040000 PTL         1)
(XEN) ACPI: SPCR CFEF3DA9, 0050 (r1 DELL   PE_SC3    6040000 PTL         1)
(XEN) ACPI: EINJ CFEF3DF9, 01B0 (r1 PTL    WHEAPTL   6040000 PTL         1)
(XEN) ACPI: HEST CFEF3FA9, 00A8 (r1 PTL    WHEAPTL   6040000 PTL         1)
(XEN) ACPI: BERT CFEF4051, 0030 (r1 PTL    WHEAPTL   6040000 PTL         1)
(XEN) ACPI: SSDT CFEF4081, 00E1 (r1 wheaos  wheaosc  6040000 INTL 20050624)
(XEN) ACPI: ERST CFEF4162, 0270 (r1 PTL    WHEAPTL   6040000 PTL         1)
(XEN) ACPI: SRAT CFEF43D2, 00E8 (r1 AMD    HAMMER    6040000 AMD         1)
(XEN) ACPI: SSDT CFEF44BA, 0A30 (r1 AMD    POWERNOW  6040000 AMD         1)
(XEN) ACPI: MCFG CFEF4EEA, 003C (r1 PTLTD    MCFG    6040000  LTP        0)
(XEN) ACPI: HPET CFEF4F26, 0038 (r1 PTLTD  HPETTBL   6040000  LTP        1)
(XEN) ACPI: APIC CFEF4F5E, 007A (r1 PTLTD    APIC    6040000  LTP        0)
(XEN) ACPI: BOOT CFEF4FD8, 0028 (r1 PTLTD  $SBFTBL$  6040000  LTP        1)
(XEN) System RAM: 4094MB (4192756kB)
(XEN) Domain heap initialised
(XEN) Processor #0 0:2 APIC version 16
(XEN) Processor #1 0:2 APIC version 16
(XEN) Processor #2 0:2 APIC version 16
(XEN) Processor #3 0:2 APIC version 16
(XEN) IOAPIC[0]: apic_id 4, version 17, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) ERST table is invalid
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2109.743 MHz processor.
(XEN) Initing memory sharing.
(XEN) AMD-Vi: IOMMU not found!
(XEN) I/O virtualisation disabled
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) Platform timer is 25.000MHz HPET
�(XEN) Allocated console ring of 16 KiB.
(XEN) HVM: ASIDs enabled.
(XEN) SVM: Support(XEN) Brought up 4 CPUs
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x202f000
(XEN) PHYSICAL MEY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000118000000->000000011c000000 (926244 pages to be allocated)
(XEN)  Init. ramdisk: 00000001216cc000->000000012ffffc00
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff81000000->ffffffff8202f000
(XEN)  Init. ramdisk: ffffffff8202f000->ffffffff90962c00
(XEN)  Phys-Mach map: ffffffff90963000->ffffffff91108ac0
(XEN)  Start info:    ffffffff91109000->ffffffff911094b4
(XEN)  Page tables:   ffffffff9110a000->ffffffff91197000
(XEN)  Boot stack:    ffffffff91197000->ffffffff91198000
(XEN)  TOTAL:         ffffffff80000000->ffffffff91400000
(XEN)  ENTRY ADDRESS: ffffffff81aeb200
(XEN) Dom0 has maximum 4 VCPUs
(XEN) Scrubbing Free RAM: .done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: All
(XEN) **********************************************
(XEN) ******* WARNING: CONSOLE OUTPUT IS SYNCHRONOUS
(XEN) ******* This option is intended to aid debugging of Xen by ensuring
(XEN) ******* that all output is synchronously delivered on the serial line.
(XEN) ******* However it can introduce SIGNIFICANT latencies and affect
(XEN) ******* timekeeping. It is NOT recommended for production use!
(XEN) **********************************************
(XEN) 3... 2... 1... 
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 228kB init memory.
mapping kernel into physical memory
Xen: setup ISA identity maps
about to get started...

and then it is just stuck.. This is v3.1-rc7 + your patches

Re: Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

[-- Attachment #1: Type: text/plain, Size: 426 bytes --]

> They don't work on AMD boxes:
> 
> mapping kernel into physical memory
> Xen: setup ISA identity maps
> about to get started...
> 
> and then it is just stuck.. This is v3.1-rc7 + your patches

This is a Dell T105 w/ 4GB of RAM. The config file is attached.

earlyprintk=xen shows nothing, .. interestingly enough Ctrl-A
works - it is just that I can't see anything from the Linux kernel.

It probably is stuck in a loop...

[-- Attachment #2: .config --]
[-- Type: text/plain, Size: 74408 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 3.1.0-rc7 Kernel Configuration
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_ARCH_CLOCKSOURCE_DATA=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_HAVE_CPUMASK_OF_CPU_MAP=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ZONE_DMA32=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_HAVE_INTEL_TXT=y
CONFIG_X86_64_SMP=y
CONFIG_X86_HT=y
CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11"
# CONFIG_KTIME_SCALAR is not set
CONFIG_ARCH_CPU_PROBE_RELEASE=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_FHANDLE is not set
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_WATCH=y
CONFIG_AUDIT_TREE=y
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y

#
# RCU Subsystem
#
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=64
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_RCU_BOOST is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=18
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_CGROUP_FREEZER=y
# CONFIG_CGROUP_DEVICE is not set
CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
# CONFIG_CGROUP_MEM_RES_CTLR is not set
# CONFIG_CGROUP_PERF is not set
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
# CONFIG_RT_GROUP_SCHED is not set
# CONFIG_BLK_CGROUP is not set
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
# CONFIG_SCHED_AUTOGROUP is not set
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_SYSFS_DEPRECATED_V2 is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="early-devs"
CONFIG_INITRAMFS_ROOT_UID=0
CONFIG_INITRAMFS_ROOT_GID=0
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
# CONFIG_INITRAMFS_COMPRESSION_NONE is not set
CONFIG_INITRAMFS_COMPRESSION_GZIP=y
# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set
# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set
# CONFIG_INITRAMFS_COMPRESSION_XZ is not set
# CONFIG_INITRAMFS_COMPRESSION_LZO is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_PERF_COUNTERS is not set
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# CONFIG_OPROFILE is not set
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
# CONFIG_JUMP_LABEL is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_KRETPROBES=y
CONFIG_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_FREEZER=y

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_X86_MPPARSE=y
# CONFIG_X86_EXTENDED_PLATFORM is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_PARAVIRT_GUEST=y
# CONFIG_PARAVIRT_TIME_ACCOUNTING is not set
CONFIG_XEN=y
CONFIG_XEN_DOM0=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_PVHVM=y
CONFIG_XEN_MAX_DOMAIN_MEMORY=128
CONFIG_XEN_SAVE_RESTORE=y
CONFIG_XEN_DEBUG_FS=y
CONFIG_XEN_DEBUG=y
CONFIG_KVM_CLOCK=y
CONFIG_KVM_GUEST=y
CONFIG_PARAVIRT=y
CONFIG_PARAVIRT_SPINLOCKS=y
CONFIG_PARAVIRT_CLOCK=y
CONFIG_PARAVIRT_DEBUG=y
CONFIG_NO_BOOTMEM=y
# CONFIG_MEMTEST is not set
# CONFIG_MK8 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
CONFIG_GENERIC_CPU=y
CONFIG_X86_INTERNODE_CACHE_SHIFT=7
CONFIG_X86_CMPXCHG=y
CONFIG_CMPXCHG_LOCAL=y
CONFIG_CMPXCHG_DOUBLE=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_XADD=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
CONFIG_GART_IOMMU=y
CONFIG_CALGARY_IOMMU=y
CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y
CONFIG_SWIOTLB=y
CONFIG_IOMMU_HELPER=y
CONFIG_MAXSMP=y
CONFIG_NR_CPUS=4096
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_IRQ_TIME_ACCOUNTING=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_COUNT=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
CONFIG_X86_MCE_AMD=y
CONFIG_X86_MCE_THRESHOLD=y
CONFIG_X86_MCE_INJECT=y
CONFIG_X86_THERMAL_VECTOR=y
# CONFIG_I8K is not set
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_AMD=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_DIRECT_GBPAGES=y
CONFIG_NUMA=y
CONFIG_AMD_NUMA=y
CONFIG_X86_64_ACPI_NUMA=y
CONFIG_NODES_SPAN_OTHER_NODES=y
# CONFIG_NUMA_EMU is not set
CONFIG_NODES_SHIFT=10
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_PROC_KCORE_TEXT=y
CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_NEED_MULTIPLE_NODES=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_MEMBLOCK=y
# CONFIG_MEMORY_HOTPLUG is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_MEMORY_FAILURE is not set
# CONFIG_TRANSPARENT_HUGEPAGE is not set
CONFIG_CLEANCACHE=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
CONFIG_X86_RESERVE_LOW=64
CONFIG_MTRR=y
# CONFIG_MTRR_SANITIZER is not set
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_EFI=y
CONFIG_SECCOMP=y
CONFIG_CC_STACKPROTECTOR=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
# CONFIG_KEXEC_JUMP is not set
CONFIG_PHYSICAL_START=0x1000000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_USE_PERCPU_NUMA_NODE_ID=y

#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_RUNTIME is not set
CONFIG_PM=y
CONFIG_PM_DEBUG=y
# CONFIG_PM_ADVANCED_DEBUG is not set
# CONFIG_PM_TEST_SUSPEND is not set
CONFIG_CAN_PM_TRACE=y
CONFIG_PM_TRACE=y
CONFIG_PM_TRACE_RTC=y
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
# CONFIG_ACPI_PROCFS_POWER is not set
# CONFIG_ACPI_EC_DEBUGFS is not set
CONFIG_ACPI_PROC_EVENT=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=m
CONFIG_ACPI_FAN=y
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_HOTPLUG_CPU=y
# CONFIG_ACPI_PROCESSOR_AGGREGATOR is not set
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_NUMA=y
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_DEBUG_FUNC_TRACE=y
# CONFIG_ACPI_PCI_SLOT is not set
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_SBS is not set
# CONFIG_ACPI_HED is not set
# CONFIG_ACPI_CUSTOM_METHOD is not set
# CONFIG_ACPI_APEI is not set
# CONFIG_SFI is not set

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_STAT is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y

#
# x86 CPU frequency scaling drivers
#
# CONFIG_X86_PCC_CPUFREQ is not set
CONFIG_X86_ACPI_CPUFREQ=y
CONFIG_X86_POWERNOW_K8=y
CONFIG_X86_SPEEDSTEP_CENTRINO=y
CONFIG_X86_P4_CLOCKMOD=y

#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=y
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
# CONFIG_INTEL_IDLE is not set

#
# Memory power savings
#
# CONFIG_I7300_IDLE is not set

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_XEN=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
CONFIG_PCIEPORTBUS=y
# CONFIG_HOTPLUG_PCI_PCIE is not set
CONFIG_PCIEAER=y
CONFIG_PCIE_ECRC=y
# CONFIG_PCIEAER_INJECT is not set
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
CONFIG_XEN_PCIDEV_FRONTEND=y
CONFIG_HT_IRQ=y
CONFIG_PCI_IOV=y
CONFIG_PCI_IOAPIC=y
CONFIG_PCI_LABEL=y
CONFIG_ISA_DMA_API=y
CONFIG_AMD_NB=y
CONFIG_PCCARD=y
CONFIG_PCMCIA=y
CONFIG_PCMCIA_LOAD_CIS=y
CONFIG_CARDBUS=y

#
# PC-card bridges
#
CONFIG_YENTA=y
CONFIG_YENTA_O2=y
CONFIG_YENTA_RICOH=y
CONFIG_YENTA_TI=y
CONFIG_YENTA_ENE_TUNE=y
CONFIG_YENTA_TOSHIBA=y
# CONFIG_PD6729 is not set
# CONFIG_I82092 is not set
CONFIG_PCCARD_NONSTATIC=y
CONFIG_HOTPLUG_PCI=y
# CONFIG_HOTPLUG_PCI_FAKE is not set
# CONFIG_HOTPLUG_PCI_ACPI is not set
# CONFIG_HOTPLUG_PCI_CPCI is not set
# CONFIG_HOTPLUG_PCI_SHPC is not set
# CONFIG_RAPIDIO is not set

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
# CONFIG_HAVE_AOUT is not set
CONFIG_BINFMT_MISC=y
CONFIG_IA32_EMULATION=y
# CONFIG_IA32_AOUT is not set
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_KEYS_COMPAT=y
CONFIG_HAVE_TEXT_POKE_SMP=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
CONFIG_IP_MROUTE=y
# CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
CONFIG_INET_LRO=y
# CONFIG_INET_DIAG is not set
CONFIG_TCP_CONG_ADVANCED=y
# CONFIG_TCP_CONG_BIC is not set
CONFIG_TCP_CONG_CUBIC=y
# CONFIG_TCP_CONG_WESTWOOD is not set
# CONFIG_TCP_CONG_HTCP is not set
# CONFIG_TCP_CONG_HSTCP is not set
# CONFIG_TCP_CONG_HYBLA is not set
# CONFIG_TCP_CONG_VEGAS is not set
# CONFIG_TCP_CONG_SCALABLE is not set
# CONFIG_TCP_CONG_LP is not set
# CONFIG_TCP_CONG_VENO is not set
# CONFIG_TCP_CONG_YEAH is not set
# CONFIG_TCP_CONG_ILLINOIS is not set
CONFIG_DEFAULT_CUBIC=y
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="cubic"
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6=y
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
CONFIG_INET6_AH=y
CONFIG_INET6_ESP=y
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
CONFIG_INET6_XFRM_MODE_BEET=y
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_SIT=y
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
CONFIG_NETLABEL=y
CONFIG_NETWORK_SECMARK=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
# CONFIG_NETFILTER_ADVANCED is not set

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=y
CONFIG_NETFILTER_NETLINK_LOG=y
CONFIG_NF_CONNTRACK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_FTP=y
CONFIG_NF_CONNTRACK_IRC=y
CONFIG_NF_CONNTRACK_SIP=y
CONFIG_NF_CT_NETLINK=y
CONFIG_NETFILTER_XTABLES=y

#
# Xtables combined modules
#
CONFIG_NETFILTER_XT_MARK=m

#
# Xtables targets
#
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
CONFIG_NETFILTER_XT_TARGET_NFLOG=y
CONFIG_NETFILTER_XT_TARGET_SECMARK=y
CONFIG_NETFILTER_XT_TARGET_TCPMSS=y

#
# Xtables matches
#
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
CONFIG_NETFILTER_XT_MATCH_POLICY=y
CONFIG_NETFILTER_XT_MATCH_STATE=y
# CONFIG_IP_SET is not set
# CONFIG_IP_VS is not set

#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=y
CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_ULOG=y
CONFIG_NF_NAT=y
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=y
CONFIG_NF_NAT_FTP=y
CONFIG_NF_NAT_IRC=y
# CONFIG_NF_NAT_TFTP is not set
# CONFIG_NF_NAT_AMANDA is not set
# CONFIG_NF_NAT_PPTP is not set
# CONFIG_NF_NAT_H323 is not set
CONFIG_NF_NAT_SIP=y
CONFIG_IP_NF_MANGLE=y

#
# IPv6: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV6=y
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_IPTABLES=y
CONFIG_IP6_NF_MATCH_IPV6HEADER=y
CONFIG_IP6_NF_TARGET_LOG=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
# CONFIG_BRIDGE_NF_EBTABLES is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
CONFIG_STP=y
CONFIG_BRIDGE=y
CONFIG_BRIDGE_IGMP_SNOOPING=y
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
CONFIG_LLC=y
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
CONFIG_NET_SCHED=y

#
# Queueing/Scheduling
#
# CONFIG_NET_SCH_CBQ is not set
# CONFIG_NET_SCH_HTB is not set
# CONFIG_NET_SCH_HFSC is not set
# CONFIG_NET_SCH_PRIO is not set
# CONFIG_NET_SCH_MULTIQ is not set
# CONFIG_NET_SCH_RED is not set
# CONFIG_NET_SCH_SFB is not set
# CONFIG_NET_SCH_SFQ is not set
# CONFIG_NET_SCH_TEQL is not set
# CONFIG_NET_SCH_TBF is not set
# CONFIG_NET_SCH_GRED is not set
# CONFIG_NET_SCH_DSMARK is not set
# CONFIG_NET_SCH_NETEM is not set
# CONFIG_NET_SCH_DRR is not set
# CONFIG_NET_SCH_MQPRIO is not set
# CONFIG_NET_SCH_CHOKE is not set
# CONFIG_NET_SCH_QFQ is not set
# CONFIG_NET_SCH_INGRESS is not set

#
# Classification
#
CONFIG_NET_CLS=y
# CONFIG_NET_CLS_BASIC is not set
# CONFIG_NET_CLS_TCINDEX is not set
# CONFIG_NET_CLS_ROUTE4 is not set
# CONFIG_NET_CLS_FW is not set
# CONFIG_NET_CLS_U32 is not set
# CONFIG_NET_CLS_RSVP is not set
# CONFIG_NET_CLS_RSVP6 is not set
# CONFIG_NET_CLS_FLOW is not set
# CONFIG_NET_CLS_CGROUP is not set
CONFIG_NET_EMATCH=y
CONFIG_NET_EMATCH_STACK=32
# CONFIG_NET_EMATCH_CMP is not set
# CONFIG_NET_EMATCH_NBYTE is not set
# CONFIG_NET_EMATCH_U32 is not set
# CONFIG_NET_EMATCH_META is not set
# CONFIG_NET_EMATCH_TEXT is not set
CONFIG_NET_CLS_ACT=y
# CONFIG_NET_ACT_POLICE is not set
# CONFIG_NET_ACT_GACT is not set
# CONFIG_NET_ACT_MIRRED is not set
# CONFIG_NET_ACT_IPT is not set
# CONFIG_NET_ACT_NAT is not set
# CONFIG_NET_ACT_PEDIT is not set
# CONFIG_NET_ACT_SIMP is not set
# CONFIG_NET_ACT_SKBEDIT is not set
# CONFIG_NET_ACT_CSUM is not set
CONFIG_NET_SCH_FIFO=y
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
CONFIG_HAVE_BPF_JIT=y
# CONFIG_BPF_JIT is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
CONFIG_FIB_RULES=y
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
CONFIG_RFKILL=y
CONFIG_RFKILL_INPUT=y
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_DEVTMPFS is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
CONFIG_DEBUG_DEVRES=y
CONFIG_SYS_HYPERVISOR=y
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
# CONFIG_PARPORT is not set
CONFIG_PNP=y
CONFIG_PNP_DEBUG_MESSAGES=y

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=16384
# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_XEN_BLKDEV_FRONTEND=m
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_VIRTIO_BLK=m
# CONFIG_BLK_DEV_HD is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=m
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=m
CONFIG_SCSI_DMA=y
CONFIG_SCSI_TGT=m
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=m
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=m
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_FC_TGT_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=m
CONFIG_ISCSI_BOOT_SYSFS=m
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_SCSI_BNX2X_FCOE is not set
# CONFIG_BE2ISCSI is not set
CONFIG_BLK_DEV_3W_XXXX_RAID=m
# CONFIG_SCSI_HPSA is not set
CONFIG_SCSI_3W_9XXX=m
# CONFIG_SCSI_3W_SAS is not set
CONFIG_SCSI_ACARD=m
CONFIG_SCSI_AACRAID=m
CONFIG_SCSI_AIC7XXX=m
CONFIG_AIC7XXX_CMDS_PER_DEVICE=8
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
CONFIG_AIC7XXX_DEBUG_ENABLE=y
CONFIG_AIC7XXX_DEBUG_MASK=0
CONFIG_AIC7XXX_REG_PRETTY_PRINT=y
CONFIG_SCSI_AIC7XXX_OLD=m
CONFIG_SCSI_AIC79XX=m
CONFIG_AIC79XX_CMDS_PER_DEVICE=32
CONFIG_AIC79XX_RESET_DELAY_MS=15000
CONFIG_AIC79XX_DEBUG_ENABLE=y
CONFIG_AIC79XX_DEBUG_MASK=0
CONFIG_AIC79XX_REG_PRETTY_PRINT=y
CONFIG_SCSI_AIC94XX=m
# CONFIG_AIC94XX_DEBUG is not set
CONFIG_SCSI_MVSAS=m
# CONFIG_SCSI_MVSAS_DEBUG is not set
# CONFIG_SCSI_MVSAS_TASKLET is not set
CONFIG_SCSI_DPT_I2O=m
CONFIG_SCSI_ADVANSYS=m
CONFIG_SCSI_ARCMSR=m
CONFIG_SCSI_ARCMSR_AER=y
CONFIG_MEGARAID_NEWGEN=y
CONFIG_MEGARAID_MM=m
CONFIG_MEGARAID_MAILBOX=m
CONFIG_MEGARAID_LEGACY=m
CONFIG_MEGARAID_SAS=m
CONFIG_SCSI_MPT2SAS=m
CONFIG_SCSI_MPT2SAS_MAX_SGE=128
CONFIG_SCSI_MPT2SAS_LOGGING=y
CONFIG_SCSI_HPTIOP=m
CONFIG_SCSI_BUSLOGIC=m
# CONFIG_VMWARE_PVSCSI is not set
CONFIG_LIBFC=m
CONFIG_LIBFCOE=m
CONFIG_FCOE=m
# CONFIG_FCOE_FNIC is not set
CONFIG_SCSI_DMX3191D=m
CONFIG_SCSI_EATA=m
CONFIG_SCSI_EATA_TAGGED_QUEUE=y
CONFIG_SCSI_EATA_LINKED_COMMANDS=y
CONFIG_SCSI_EATA_MAX_TAGS=16
CONFIG_SCSI_FUTURE_DOMAIN=m
CONFIG_SCSI_GDTH=m
CONFIG_SCSI_ISCI=m
CONFIG_SCSI_IPS=m
CONFIG_SCSI_INITIO=m
# CONFIG_SCSI_INIA100 is not set
CONFIG_SCSI_STEX=m
CONFIG_SCSI_SYM53C8XX_2=m
CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
CONFIG_SCSI_SYM53C8XX_MMIO=y
CONFIG_SCSI_IPR=m
# CONFIG_SCSI_IPR_TRACE is not set
# CONFIG_SCSI_IPR_DUMP is not set
CONFIG_SCSI_QLOGIC_1280=m
CONFIG_SCSI_QLA_FC=m
# CONFIG_SCSI_QLA_ISCSI is not set
CONFIG_SCSI_LPFC=m
# CONFIG_SCSI_LPFC_DEBUG_FS is not set
CONFIG_SCSI_DC395x=m
CONFIG_SCSI_DC390T=m
CONFIG_SCSI_DEBUG=m
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
CONFIG_SCSI_SRP=m
# CONFIG_SCSI_BFA_FC is not set
# CONFIG_SCSI_LOWLEVEL_PCMCIA is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=m
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_ACPI=y
CONFIG_SATA_PMP=y

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=m
# CONFIG_SATA_AHCI_PLATFORM is not set
CONFIG_SATA_INIC162X=m
# CONFIG_SATA_ACARD_AHCI is not set
CONFIG_SATA_SIL24=m
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
CONFIG_PDC_ADMA=m
CONFIG_SATA_QSTOR=m
CONFIG_SATA_SX4=m
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=m
CONFIG_SATA_MV=m
CONFIG_SATA_NV=m
CONFIG_SATA_PROMISE=m
CONFIG_SATA_SIL=m
CONFIG_SATA_SIS=m
CONFIG_SATA_SVW=m
CONFIG_SATA_ULI=m
CONFIG_SATA_VIA=m
CONFIG_SATA_VITESSE=m

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARASAN_CF is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CS5536 is not set
# CONFIG_PATA_CYPRESS is not set
CONFIG_PATA_EFAR=m
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
CONFIG_PATA_MARVELL=m
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
CONFIG_PATA_PDC_OLD=m
CONFIG_PATA_RADISYS=m
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SC1200 is not set
CONFIG_PATA_SCH=m
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
CONFIG_PATA_SIS=m
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
CONFIG_PATA_WINBOND=m

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
CONFIG_PATA_PCMCIA=m
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_PATA_ACPI is not set
CONFIG_ATA_GENERIC=m
CONFIG_PATA_LEGACY=m
CONFIG_MD=y
CONFIG_BLK_DEV_MD=m
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
# CONFIG_MULTICORE_RAID456 is not set
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_BLK_DEV_DM=m
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
# CONFIG_DM_RAID is not set
# CONFIG_DM_LOG_USERSPACE is not set
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
# CONFIG_DM_MULTIPATH_QL is not set
# CONFIG_DM_MULTIPATH_ST is not set
CONFIG_DM_DELAY=m
# CONFIG_DM_UEVENT is not set
# CONFIG_DM_FLAKEY is not set
CONFIG_TARGET_CORE=m
CONFIG_TCM_IBLOCK=m
CONFIG_TCM_FILEIO=m
CONFIG_TCM_PSCSI=m
CONFIG_LOOPBACK_TARGET=m
CONFIG_TCM_FC=m
CONFIG_ISCSI_TARGET=m
CONFIG_FUSION=y
CONFIG_FUSION_SPI=m
CONFIG_FUSION_FC=m
CONFIG_FUSION_SAS=m
CONFIG_FUSION_MAX_SGE=40
CONFIG_FUSION_CTL=m
# CONFIG_FUSION_LOGGING is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_I2O is not set
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
# CONFIG_IFB is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=y
# CONFIG_VETH is not set
# CONFIG_NET_SB1000 is not set
# CONFIG_ARCNET is not set
CONFIG_MII=m
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
CONFIG_MARVELL_PHY=m
CONFIG_DAVICOM_PHY=m
CONFIG_QSEMI_PHY=m
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
CONFIG_VITESSE_PHY=m
CONFIG_SMSC_PHY=m
CONFIG_BROADCOM_PHY=m
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MICREL_PHY is not set
CONFIG_FIXED_PHY=y
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
CONFIG_HAPPYMEAL=m
CONFIG_SUNGEM=m
CONFIG_CASSINI=m
CONFIG_NET_VENDOR_3COM=y
CONFIG_VORTEX=m
CONFIG_TYPHOON=m
# CONFIG_ETHOC is not set
# CONFIG_DNET is not set
CONFIG_NET_TULIP=y
# CONFIG_DE2104X is not set
# CONFIG_TULIP is not set
# CONFIG_DE4X5 is not set
# CONFIG_WINBOND_840 is not set
# CONFIG_DM9102 is not set
# CONFIG_ULI526X is not set
# CONFIG_PCMCIA_XIRCOM is not set
# CONFIG_HP100 is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set
# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set
# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_KSZ884X_PCI is not set
# CONFIG_B44 is not set
CONFIG_FORCEDETH=y
CONFIG_E100=m
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
CONFIG_NE2K_PCI=m
# CONFIG_8139CP is not set
CONFIG_8139TOO=m
# CONFIG_8139TOO_PIO is not set
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SMSC9420 is not set
# CONFIG_SUNDANCE is not set
CONFIG_TLAN=m
# CONFIG_KS8851_MLL is not set
CONFIG_VIA_RHINE=m
# CONFIG_VIA_RHINE_MMIO is not set
CONFIG_SC92031=m
# CONFIG_ATL2 is not set
CONFIG_NETDEV_1000=y
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
CONFIG_E1000=m
CONFIG_E1000E=m
# CONFIG_IP1000 is not set
CONFIG_IGB=m
CONFIG_IGBVF=m
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
CONFIG_R8169=m
# CONFIG_SIS190 is not set
CONFIG_SKGE=m
# CONFIG_SKGE_DEBUG is not set
# CONFIG_SKGE_GENESIS is not set
CONFIG_SKY2=m
# CONFIG_SKY2_DEBUG is not set
CONFIG_VIA_VELOCITY=m
CONFIG_TIGON3=y
CONFIG_BNX2=m
# CONFIG_CNIC is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
CONFIG_ATL1C=m
# CONFIG_JME is not set
# CONFIG_STMMAC_ETH is not set
# CONFIG_PCH_GBE is not set
CONFIG_NETDEV_10000=y
CONFIG_MDIO=m
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
# CONFIG_ENIC is not set
CONFIG_IXGBE=m
# CONFIG_IXGBEVF is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_MLX4_EN is not set
# CONFIG_MLX4_CORE is not set
# CONFIG_TEHUTI is not set
CONFIG_BNX2X=m
# CONFIG_QLCNIC is not set
# CONFIG_QLGE is not set
# CONFIG_BNA is not set
# CONFIG_SFC is not set
# CONFIG_BE2NET is not set
CONFIG_TR=y
# CONFIG_IBMOL is not set
CONFIG_3C359=m
# CONFIG_TMS380TR is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_HSO is not set
# CONFIG_USB_IPHETH is not set
CONFIG_NET_PCMCIA=y
# CONFIG_PCMCIA_3C589 is not set
# CONFIG_PCMCIA_3C574 is not set
# CONFIG_PCMCIA_FMVJ18X is not set
# CONFIG_PCMCIA_PCNET is not set
# CONFIG_PCMCIA_NMCLAN is not set
# CONFIG_PCMCIA_SMC91C92 is not set
# CONFIG_PCMCIA_XIRC2PS is not set
# CONFIG_PCMCIA_AXNET is not set
# CONFIG_PCMCIA_IBMTR is not set
# CONFIG_WAN is not set

#
# CAIF transport drivers
#
CONFIG_XEN_NETDEV_FRONTEND=m
CONFIG_XEN_NETDEV_BACKEND=y
CONFIG_FDDI=y
# CONFIG_DEFXX is not set
# CONFIG_SKFP is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
CONFIG_NETCONSOLE=m
# CONFIG_NETCONSOLE_DYNAMIC is not set
CONFIG_NETPOLL=y
# CONFIG_NETPOLL_TRAP is not set
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_VIRTIO_NET=m
# CONFIG_VMXNET3 is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=m
# CONFIG_INPUT_POLLDEV is not set
CONFIG_INPUT_SPARSEKMAP=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
CONFIG_INPUT_JOYSTICK=y
# CONFIG_JOYSTICK_ANALOG is not set
# CONFIG_JOYSTICK_A3D is not set
# CONFIG_JOYSTICK_ADI is not set
# CONFIG_JOYSTICK_COBRA is not set
# CONFIG_JOYSTICK_GF2K is not set
# CONFIG_JOYSTICK_GRIP is not set
# CONFIG_JOYSTICK_GRIP_MP is not set
# CONFIG_JOYSTICK_GUILLEMOT is not set
# CONFIG_JOYSTICK_INTERACT is not set
# CONFIG_JOYSTICK_SIDEWINDER is not set
# CONFIG_JOYSTICK_TMDC is not set
# CONFIG_JOYSTICK_IFORCE is not set
# CONFIG_JOYSTICK_WARRIOR is not set
# CONFIG_JOYSTICK_MAGELLAN is not set
# CONFIG_JOYSTICK_SPACEORB is not set
# CONFIG_JOYSTICK_SPACEBALL is not set
# CONFIG_JOYSTICK_STINGER is not set
# CONFIG_JOYSTICK_TWIDJOY is not set
# CONFIG_JOYSTICK_ZHENHUA is not set
# CONFIG_JOYSTICK_AS5011 is not set
# CONFIG_JOYSTICK_JOYDUMP is not set
# CONFIG_JOYSTICK_XPAD is not set
CONFIG_INPUT_TABLET=y
# CONFIG_TABLET_USB_ACECAD is not set
# CONFIG_TABLET_USB_AIPTEK is not set
# CONFIG_TABLET_USB_GTCO is not set
# CONFIG_TABLET_USB_HANWANG is not set
# CONFIG_TABLET_USB_KBTAB is not set
# CONFIG_TABLET_USB_WACOM is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
# CONFIG_INPUT_AD714X is not set
# CONFIG_INPUT_PCSPKR is not set
# CONFIG_INPUT_MMA8450 is not set
# CONFIG_INPUT_MPU3050 is not set
# CONFIG_INPUT_APANEL is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE is not set
# CONFIG_INPUT_ATI_REMOTE2 is not set
# CONFIG_INPUT_KEYSPAN_REMOTE is not set
# CONFIG_INPUT_KXTJ9 is not set
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
# CONFIG_INPUT_UINPUT is not set
# CONFIG_INPUT_PCF8574 is not set
# CONFIG_INPUT_ADXL34X is not set
# CONFIG_INPUT_CMA3000 is not set
CONFIG_INPUT_XEN_KBDDEV_FRONTEND=m

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_CS=m
CONFIG_SERIAL_8250_NR_UARTS=16
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
# CONFIG_SERIAL_8250_RSA is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MFD_HSU is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_CONSOLE_POLL=y
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_PCH_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
CONFIG_HVC_DRIVER=y
CONFIG_HVC_IRQ=y
CONFIG_HVC_XEN=y
# CONFIG_VIRTIO_CONSOLE is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_HW_RANDOM_INTEL is not set
# CONFIG_HW_RANDOM_AMD is not set
CONFIG_HW_RANDOM_VIA=y
CONFIG_HW_RANDOM_VIRTIO=m
CONFIG_NVRAM=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set

#
# PCMCIA character devices
#
# CONFIG_SYNCLINK_CS is not set
# CONFIG_CARDMAN_4000 is not set
# CONFIG_CARDMAN_4040 is not set
# CONFIG_IPWIRELESS is not set
# CONFIG_MWAVE is not set
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
# CONFIG_HPET_MMAP is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
# CONFIG_RAMOOPS is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
# CONFIG_I2C_CHARDEV is not set
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
CONFIG_I2C_I801=y
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# ACPI drivers
#
# CONFIG_I2C_SCMI is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_INTEL_MID is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set
# CONFIG_I2C_EG20T is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_SPI is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#

#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_BQ20Z75 is not set
# CONFIG_BATTERY_BQ27x00 is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7411 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_ASC7621 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_K10TEMP is not set
# CONFIG_SENSORS_FAM15H_POWER is not set
# CONFIG_SENSORS_ASB100 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_FSCHMD is not set
# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_CORETEMP is not set
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_LINEAGE is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM73 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LTC4151 is not set
# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_LTC4261 is not set
# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_LM95245 is not set
# CONFIG_SENSORS_MAX16065 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX1668 is not set
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6642 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_NTC_THERMISTOR is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_PMBUS is not set
# CONFIG_SENSORS_SHT21 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_EMC1403 is not set
# CONFIG_SENSORS_EMC2103 is not set
# CONFIG_SENSORS_EMC6W201 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_SCH56XX_COMMON is not set
# CONFIG_SENSORS_SCH5627 is not set
# CONFIG_SENSORS_SCH5636 is not set
# CONFIG_SENSORS_ADS1015 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_AMC6821 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_TMP102 is not set
# CONFIG_SENSORS_TMP401 is not set
# CONFIG_SENSORS_TMP421 is not set
# CONFIG_SENSORS_VIA_CPUTEMP is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83795 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_APPLESMC is not set

#
# ACPI drivers
#
# CONFIG_SENSORS_ACPI_POWER is not set
# CONFIG_SENSORS_ATK0110 is not set
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y

#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set
CONFIG_MFD_SUPPORT=y
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS6507X is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_CS5535 is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=y
CONFIG_AGP_SIS=y
CONFIG_AGP_VIA=y
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
CONFIG_VGA_SWITCHEROO=y
CONFIG_DRM=y
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_TTM=m
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
CONFIG_DRM_RADEON=m
CONFIG_DRM_RADEON_KMS=y
CONFIG_DRM_I915=m
CONFIG_DRM_I915_KMS=y
CONFIG_DRM_MGA=m
CONFIG_DRM_SIS=m
CONFIG_DRM_VIA=m
CONFIG_DRM_SAVAGE=m
# CONFIG_STUB_POULSBO is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=y
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
# CONFIG_FB_DDC is not set
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
# CONFIG_FB_FOREIGN_ENDIAN is not set
CONFIG_FB_SYS_FOPS=m
# CONFIG_FB_WMT_GE_ROPS is not set
CONFIG_FB_DEFERRED_IO=y
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
CONFIG_FB_CIRRUS=y
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_UVESA is not set
# CONFIG_FB_VESA is not set
CONFIG_FB_EFI=y
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_LE80578 is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_VIRTUAL is not set
CONFIG_XEN_FBDEV_FRONTEND=m
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_GENERIC=y
# CONFIG_BACKLIGHT_PROGEAR is not set
# CONFIG_BACKLIGHT_APPLE is not set
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set

#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=m

#
# Display hardware drivers
#

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=m
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
# CONFIG_LOGO is not set
# CONFIG_SOUND is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=m
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=m
CONFIG_HID_PID=y
CONFIG_USB_HIDDEV=y

#
# Special HID drivers
#
CONFIG_HID_A4TECH=m
# CONFIG_HID_ACRUX is not set
CONFIG_HID_APPLE=m
CONFIG_HID_BELKIN=m
CONFIG_HID_CHERRY=m
CONFIG_HID_CHICONY=m
CONFIG_HID_CYPRESS=m
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
CONFIG_HID_EZKEY=m
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
CONFIG_HID_KYE=m
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
CONFIG_HID_GYRATION=m
# CONFIG_HID_TWINHAN is not set
CONFIG_HID_KENSINGTON=m
# CONFIG_HID_LCPOWER is not set
CONFIG_HID_LOGITECH=m
CONFIG_LOGITECH_FF=y
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_LOGIG940_FF is not set
# CONFIG_LOGIWII_FF is not set
CONFIG_HID_MICROSOFT=m
CONFIG_HID_MONTEREY=m
# CONFIG_HID_MULTITOUCH is not set
CONFIG_HID_NTRIG=m
# CONFIG_HID_ORTEK is not set
CONFIG_HID_PANTHERLORD=m
CONFIG_PANTHERLORD_FF=y
CONFIG_HID_PETALYNX=m
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_QUANTA is not set
# CONFIG_HID_ROCCAT is not set
CONFIG_HID_SAMSUNG=m
CONFIG_HID_SONY=m
# CONFIG_HID_SPEEDLINK is not set
CONFIG_HID_SUNPLUS=m
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
CONFIG_HID_TOPSEED=m
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_DEVICE_CLASS is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
CONFIG_USB_MON=y
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_XHCI_HCD=y
# CONFIG_USB_XHCI_HCD_DEBUGGING is not set
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_WHCI_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
CONFIG_USB_PRINTER=y
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_LM3530 is not set
# CONFIG_LEDS_ALIX2 is not set
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_LP5523 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_LEDS_INTEL_SS4200 is not set
# CONFIG_LEDS_DELL_NETBOOKS is not set
# CONFIG_LEDS_TRIGGERS is not set

#
# LED Triggers
#
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC=y

#
# Reporting subsystems
#
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_DECODE_MCE=y
# CONFIG_EDAC_MCE_INJ is not set
# CONFIG_EDAC_MM_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
# CONFIG_INTEL_MID_DMAC is not set
# CONFIG_INTEL_IOATDMA is not set
# CONFIG_TIMB_DMA is not set
# CONFIG_PCH_DMA is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
CONFIG_VIRTIO=y
CONFIG_VIRTIO_RING=y

#
# Virtio drivers
#
CONFIG_VIRTIO_PCI=m
CONFIG_VIRTIO_BALLOON=y

#
# Xen driver support
#
CONFIG_XEN_BALLOON=y
CONFIG_XEN_SELFBALLOONING=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DEV_EVTCHN=m
CONFIG_XEN_BACKEND=y
CONFIG_XENFS=m
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_XENBUS_FRONTEND=y
CONFIG_XEN_GNTDEV=y
CONFIG_XEN_GRANT_DEV_ALLOC=y
CONFIG_XEN_PLATFORM_PCI=m
CONFIG_SWIOTLB_XEN=y
CONFIG_XEN_TMEM=y
CONFIG_XEN_PCIDEV_BACKEND=y
CONFIG_STAGING=y
# CONFIG_ET131X is not set
# CONFIG_SLICOSS is not set
CONFIG_USBIP_CORE=m
CONFIG_USBIP_VHCI_HCD=m
CONFIG_USBIP_HOST=m
# CONFIG_USBIP_DEBUG is not set
# CONFIG_ECHO is not set
# CONFIG_BRCMUTIL is not set
# CONFIG_COMEDI is not set
# CONFIG_ASUS_OLED is not set
# CONFIG_RTS_PSTOR is not set
# CONFIG_TRANZPORT is not set
# CONFIG_POHMELFS is not set
# CONFIG_IDE_PHISON is not set
# CONFIG_DRM_VMWGFX is not set
CONFIG_DRM_NOUVEAU=m
# CONFIG_DRM_NOUVEAU_BACKLIGHT is not set
CONFIG_DRM_NOUVEAU_DEBUG=y

#
# I2C encoder or helper chips
#
CONFIG_DRM_I2C_CH7006=m
CONFIG_DRM_I2C_SIL164=m
# CONFIG_HYPERV is not set
# CONFIG_VME_BUS is not set
# CONFIG_DX_SEP is not set
# CONFIG_IIO is not set
CONFIG_XVMALLOC=y
CONFIG_ZRAM=y
# CONFIG_ZRAM_DEBUG is not set
CONFIG_ZCACHE=y
# CONFIG_FB_SM7XX is not set
# CONFIG_CRYSTALHD is not set
# CONFIG_FB_XGI is not set
# CONFIG_ACPI_QUICKSTART is not set
# CONFIG_USB_ENESTORAGE is not set
# CONFIG_BCM_WIMAX is not set
# CONFIG_FT1000 is not set

#
# Speakup console speech
#
# CONFIG_SPEAKUP is not set
# CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4 is not set
# CONFIG_DRM_PSB is not set
# CONFIG_ALTERA_STAPL is not set
# CONFIG_INTEL_MEI is not set
CONFIG_X86_PLATFORM_DEVICES=y
# CONFIG_ACER_WMI is not set
# CONFIG_ACERHDF is not set
# CONFIG_ASUS_LAPTOP is not set
# CONFIG_DELL_WMI is not set
# CONFIG_DELL_WMI_AIO is not set
# CONFIG_FUJITSU_LAPTOP is not set
# CONFIG_HP_ACCEL is not set
# CONFIG_HP_WMI is not set
# CONFIG_MSI_LAPTOP is not set
# CONFIG_PANASONIC_LAPTOP is not set
# CONFIG_COMPAL_LAPTOP is not set
# CONFIG_SONY_LAPTOP is not set
# CONFIG_IDEAPAD_LAPTOP is not set
# CONFIG_THINKPAD_ACPI is not set
# CONFIG_SENSORS_HDAPS is not set
# CONFIG_INTEL_MENLOW is not set
CONFIG_EEEPC_LAPTOP=y
# CONFIG_ASUS_WMI is not set
CONFIG_ACPI_WMI=m
# CONFIG_MSI_WMI is not set
# CONFIG_ACPI_ASUS is not set
# CONFIG_TOPSTAR_LAPTOP is not set
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_TOSHIBA_BT_RFKILL is not set
# CONFIG_ACPI_CMPC is not set
# CONFIG_INTEL_IPS is not set
# CONFIG_IBM_RTL is not set
# CONFIG_XO15_EBOOK is not set
# CONFIG_SAMSUNG_LAPTOP is not set
CONFIG_MXM_WMI=m
# CONFIG_INTEL_OAKTRAIL is not set
# CONFIG_SAMSUNG_Q10 is not set
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_STATS=y
CONFIG_DMAR=y
# CONFIG_DMAR_DEFAULT_ON is not set
CONFIG_DMAR_FLOPPY_WA=y
# CONFIG_INTR_REMAP is not set
# CONFIG_VIRT_DRIVERS is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_EFI_VARS=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
CONFIG_DMIID=y
# CONFIG_DMI_SYSFS is not set
CONFIG_ISCSI_IBFT_FIND=y
CONFIG_ISCSI_IBFT=m
# CONFIG_SIGMA is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# File systems
#
CONFIG_EXT2_FS=m
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT2_FS_XIP=y
CONFIG_EXT3_FS=m
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4_FS=m
CONFIG_EXT4_FS_XATTR=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set
CONFIG_FS_XIP=y
CONFIG_JBD=m
# CONFIG_JBD_DEBUG is not set
CONFIG_JBD2=m
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=m
CONFIG_REISERFS_FS=m
# CONFIG_REISERFS_CHECK is not set
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=m
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
# CONFIG_JFS_DEBUG is not set
CONFIG_JFS_STATISTICS=y
CONFIG_XFS_FS=m
# CONFIG_XFS_QUOTA is not set
CONFIG_XFS_POSIX_ACL=y
# CONFIG_XFS_RT is not set
# CONFIG_XFS_DEBUG is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=m
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
# CONFIG_PRINT_QUOTA_WARNING is not set
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=y
# CONFIG_QFMT_V1 is not set
CONFIG_QFMT_V2=y
CONFIG_QUOTACTL=y
CONFIG_QUOTACTL_COMPAT=y
CONFIG_AUTOFS4_FS=y
# CONFIG_FUSE_FS is not set
CONFIG_GENERIC_ACL=y

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=y
# CONFIG_NTFS_DEBUG is not set
CONFIG_NTFS_RW=y

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_CONFIGFS_FS=m
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_LOGFS is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
# CONFIG_NFS_V4_1 is not set
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
# CONFIG_NFS_USE_NEW_IDMAPPER is not set
# CONFIG_NFSD is not set
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
# CONFIG_CEPH_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
# CONFIG_LDM_PARTITION is not set
CONFIG_SGI_PARTITION=y
# CONFIG_ULTRIX_PARTITION is not set
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
# CONFIG_DLM is not set

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
# CONFIG_ENABLE_WARN_DEPRECATED is not set
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
CONFIG_MAGIC_SYSRQ=y
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_HARDLOCKUP_DETECTOR=y
# CONFIG_BOOTPARAM_HARDLOCKUP_PANIC is not set
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=0
# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
CONFIG_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=400
# CONFIG_DEBUG_KMEMLEAK_TEST is not set
# CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set
CONFIG_DEBUG_PREEMPT=y
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
CONFIG_DEBUG_ATOMIC_SLEEP=y
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_STACKTRACE=y
CONFIG_DEBUG_STACK_USAGE=y
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_WRITECOUNT is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_ARCH_WANT_FRAME_POINTERS=y
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_RCU_CPU_STALL_VERBOSE=y
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_LKDTM is not set
# CONFIG_CPU_NOTIFIER_ERROR_INJECT is not set
CONFIG_FAULT_INJECTION=y
# CONFIG_FAILSLAB is not set
# CONFIG_FAIL_PAGE_ALLOC is not set
CONFIG_FAIL_MAKE_REQUEST=y
# CONFIG_FAIL_IO_TIMEOUT is not set
CONFIG_FAULT_INJECTION_DEBUG_FS=y
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FTRACE_NMI_ENTER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_RING_BUFFER=y
CONFIG_FTRACE_NMI_ENTER=y
CONFIG_EVENT_TRACING=y
CONFIG_EVENT_POWER_TRACING_DEPRECATED=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_PREEMPT_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_FTRACE_SYSCALLS is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_STACK_TRACER is not set
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_KPROBE_EVENT=y
CONFIG_DYNAMIC_FTRACE=y
# CONFIG_FUNCTION_PROFILER is not set
CONFIG_FTRACE_MCOUNT_RECORD=y
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_MMIOTRACE is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
CONFIG_DYNAMIC_DEBUG=y
CONFIG_DMA_API_DEBUG=y
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_ASYNC_RAID6_TEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_KGDB=y
CONFIG_KGDB_SERIAL_CONSOLE=y
# CONFIG_KGDB_TESTS is not set
# CONFIG_KGDB_LOW_LEVEL_TRAP is not set
# CONFIG_KGDB_KDB is not set
CONFIG_HAVE_ARCH_KMEMCHECK=y
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_STRICT_DEVMEM is not set
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_X86_PTDUMP=y
CONFIG_DEBUG_RODATA=y
CONFIG_DEBUG_RODATA_TEST=y
CONFIG_DEBUG_SET_MODULE_RONX=y
CONFIG_DEBUG_NX_TEST=m
# CONFIG_IOMMU_DEBUG is not set
# CONFIG_IOMMU_STRESS is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
# CONFIG_X86_DECODER_SELFTEST is not set
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
CONFIG_DEBUG_BOOT_PARAMS=y
# CONFIG_CPA_DEBUG is not set
CONFIG_OPTIMIZE_INLINING=y
# CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is not set

#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_DEBUG_PROC_KEYS=y
# CONFIG_SECURITY_DMESG_RESTRICT is not set
CONFIG_SECURITY=y
# CONFIG_SECURITYFS is not set
CONFIG_SECURITY_NETWORK=y
# CONFIG_SECURITY_NETWORK_XFRM is not set
# CONFIG_SECURITY_PATH is not set
# CONFIG_INTEL_TXT is not set
CONFIG_LSM_MMAP_MIN_ADDR=65534
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_SELINUX_BOOTPARAM=y
CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE=1
CONFIG_SECURITY_SELINUX_DISABLE=y
CONFIG_SECURITY_SELINUX_DEVELOP=y
CONFIG_SECURITY_SELINUX_AVC_STATS=y
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
# CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX is not set
# CONFIG_SECURITY_SMACK is not set
# CONFIG_SECURITY_TOMOYO is not set
# CONFIG_SECURITY_APPARMOR is not set
# CONFIG_IMA is not set
CONFIG_DEFAULT_SECURITY_SELINUX=y
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_DEFAULT_SECURITY="selinux"
CONFIG_XOR_BLOCKS=m
CONFIG_ASYNC_CORE=m
CONFIG_ASYNC_MEMCPY=m
CONFIG_ASYNC_XOR=m
CONFIG_ASYNC_PQ=m
CONFIG_ASYNC_RAID6_RECOV=m
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CRC32C_INTEL=m
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=y
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL is not set

#
# Ciphers
#
# CONFIG_CRYPTO_AES is not set
# CONFIG_CRYPTO_AES_X86_64 is not set
# CONFIG_CRYPTO_AES_NI_INTEL is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_X86_64 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_X86_64 is not set

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
CONFIG_CRYPTO_ZLIB=y
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_PADLOCK is not set
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_APIC_ARCHITECTURE=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
CONFIG_KVM_INTEL=m
CONFIG_KVM_AMD=m
# CONFIG_KVM_MMU_AUDIT is not set
CONFIG_VHOST_NET=y
CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_RAID6_PQ=m
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC_T10DIF=y
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
# CONFIG_CRC8 is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPUMASK_OFFSTACK=y
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
# CONFIG_AVERAGE is not set
# CONFIG_CORDIC is not set

[-- Attachment #3: Type: text/plain, Size: 138 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Re: xen: memory initialization/balloon fixes (#3)

[David Vrabel]

On 24/09/11 03:08, Konrad Rzeszutek Wilk wrote:
> On Thu, Sep 15, 2011 at 01:29:21PM +0100, David Vrabel wrote:
>> This set of patches fixes some bugs in the memory initialization under
>> Xen and in Xen's memory balloon driver.  They can make 100s of MB of
>> additional RAM available (depending on the system/configuration).
>>
>> Patch 1 is already applied.
>>
>> Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
>> with patch 1 considered for 3.0 stable).
>>
>> Patch 3 is a bug fix and should be queued for 3.1 and possibly
>> queued for the 3.0 stable tree.
>>
>> Patches 5 & 6 increase the amount of low memory in 32 bit domains
>> started with < 1 GiB of RAM.  Please queue for 3.2
>>
>> Patch 7 releases all pages in the initial allocation with PFNs that
>> lie within a 1-1 mapping.  This seems correct to me as I think that
>> once the 1-1 mapping is set the MFN of the original page is lost so
>> it's no longer accessible by the kernel (and it cannot be used by
>> another domain
>>
>> Changes since #2:
>>
>> - New patch: xen: avoid adding non-existant memory if the reservation
>>   is unlimited
>> - Avoid using a hypercall to get the current number of pages in the
>>   ballon driver.  Apparently the hypercall won't return the right
>>   value if paging is used.
>> - Addresses Konrad's review comments.
> 
> They don't work on AMD boxes:

It's not specific to AMD boxes.

> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 000000000009d800 (usable)

It's because it's not correctly handling the half-page of RAM at the end
of this region.

I don't have access to any test boxes with a dodgy BIOS like this so can
you test this patch?  If it works I'll fold it in and post an updated
series.

Can you remember why this page alignment was required?  I'd like to
update the comment with the reason because the bare-metal x86 memory
init code doesn't appear to fixup the memory map in this way.

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 986661b..e473c4c 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -178,6 +178,19 @@ static unsigned long __init xen_get_max_pages(void)
 	return min(max_pages, MAX_DOMAIN_PAGES);
 }

+static void xen_e820_add_region(u64 start, u64 size, int type)
+{
+	u64 end = start + size;
+
+	/* Align RAM regions to page boundaries. */
+	if (type == E820_RAM || type == E820_UNUSABLE) {
+		start = PAGE_ALIGN(start);
+		end &= ~((u64)PAGE_SIZE - 1);
+	}
+
+	e820_add_region(start, end - start, type);
+}
+
 /**
  * machine_specific_memory_setup - Hook for machine specific memory setup.
  **/
@@ -253,10 +266,6 @@ char * __init xen_memory_setup(void)
 		u32 type = map[i].type;

 		if (type == E820_RAM) {
-			/* RAM regions must be page aligned. */
-			size -= (addr + size) % PAGE_SIZE;
-			addr = PAGE_ALIGN(addr);
-
 			if (addr < mem_end) {
 				size = min(size, mem_end - addr);
 			} else if (extra_pages) {
@@ -267,7 +276,7 @@ char * __init xen_memory_setup(void)
 				type = E820_UNUSABLE;
 		}

-		e820_add_region(addr, size, type);
+		xen_e820_add_region(addr, size, type);

 		map[i].addr += size;
 		map[i].size -= size;


David

Re: Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

> > (XEN) Xen-e820 RAM map:
> > (XEN)  0000000000000000 - 000000000009d800 (usable)
> 
> It's because it's not correctly handling the half-page of RAM at the end
> of this region.
> 
> I don't have access to any test boxes with a dodgy BIOS like this so can
> you test this patch?  If it works I'll fold it in and post an updated
> series.

It works. Albeit I think we are going to hit a problem with dmidecode
if the DMI data is right in the reserved region

(http://lists.xensource.com/archives/html/xen-devel/2011-09/msg01299.html)

As in, if it starts in 9D800 - we consider 0->9d as RAM PFN, and 9e->100 as 1-1
mapping.

I am thinking that perhaps the call to xen_set_phys_identity, where
we call PFN_UP(x) should be replaced with PFN_DOWN(x). That way
we would consider 0>9c as RAM PFN and 9D->100 as 1-1 mapping.

That would imply a new patch to your series naturally.
> 
> Can you remember why this page alignment was required?  I'd like to

The e820_* calls define how the memory subsystem will use it.
It ended at some point assuming that the full page is RAM even thought
it was only half-RAM and tried to use it and blew the machine up.

The fix was to make the calls to the e820_* with size and regions
that were page-aligned.

Anyhow, here is what the bootup looks now:

[    0.000000] Freeing  9e-a0 pfn range: 2 pages freed
[    0.000000] 1-1 mapping on 9e->a0
[    0.000000] Freeing  a0-100 pfn range: 96 pages freed
[    0.000000] 1-1 mapping on a0->100
[    0.000000] Freeing  7fff0-80000 pfn range: 16 pages freed
[    0.000000] 1-1 mapping on 7fff0->80000
[    0.000000] Freeing  cfef0-cfef5 pfn range: 5 pages freed
[    0.000000] 1-1 mapping on cfef0->cfef5
[    0.000000] Freeing  cfef5-cff7f pfn range: 138 pages freed
[    0.000000] 1-1 mapping on cfef5->cff7f
[    0.000000] Freeing  cff7f-d0000 pfn range: 129 pages freed
[    0.000000] 1-1 mapping on cff7f->d0000
[    0.000000] Freeing  d0000-f0000 pfn range: 131072 pages freed
[    0.000000] 1-1 mapping on d0000->f0000
[    0.000000] Freeing  f0000-f4b58 pfn range: 19288 pages freed
[    0.000000] 1-1 mapping on f0000->fec10
[    0.000000] 1-1 mapping on fec10->fee01
[    0.000000] 1-1 mapping on fee01->100000
[    0.000000] Released 150746 pages of unused memory
[    0.000000] Set 196994 page(s) to 1-1 mapping
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 000000000009d000 (usable)
[    0.000000]  Xen: 000000000009d800 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 000000007fff0000 (usable)
[    0.000000]  Xen: 000000007fff0000 - 0000000080000000 (reserved)


> update the comment with the reason because the bare-metal x86 memory
> init code doesn't appear to fixup the memory map in this way.
> 
> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> index 986661b..e473c4c 100644
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -178,6 +178,19 @@ static unsigned long __init xen_get_max_pages(void)
>  	return min(max_pages, MAX_DOMAIN_PAGES);
>  }
> 
> +static void xen_e820_add_region(u64 start, u64 size, int type)
> +{
> +	u64 end = start + size;
> +
> +	/* Align RAM regions to page boundaries. */
> +	if (type == E820_RAM || type == E820_UNUSABLE) {

Hm, do we care about E820_UNUSABLE to be page aligned?
If so, please comment why.

> +		start = PAGE_ALIGN(start);

Is that actually safe? Say it starts a 9ffff? We would
end up using 9f000 which is not right.

Re: Re: xen: memory initialization/balloon fixes (#3)

[David Vrabel]

On 28/09/11 00:10, Konrad Rzeszutek Wilk wrote:
>>> (XEN) Xen-e820 RAM map:
>>> (XEN)  0000000000000000 - 000000000009d800 (usable)
>>
>> It's because it's not correctly handling the half-page of RAM at the end
>> of this region.
>>
>> I don't have access to any test boxes with a dodgy BIOS like this so can
>> you test this patch?  If it works I'll fold it in and post an updated
>> series.
> 
> It works. Albeit I think we are going to hit a problem with dmidecode
> if the DMI data is right in the reserved region
> 
> (http://lists.xensource.com/archives/html/xen-devel/2011-09/msg01299.html)
> 
> As in, if it starts in 9D800 - we consider 0->9d as RAM PFN, and 9e->100 as 1-1
> mapping.
> 
> I am thinking that perhaps the call to xen_set_phys_identity, where
> we call PFN_UP(x) should be replaced with PFN_DOWN(x). That way
> we would consider 0>9c as RAM PFN and 9D->100 as 1-1 mapping.

I almost did an equivalent change (see below) but discarded it as it
would have resulting in overlapping regions and attempting to
release/map some pages twice.

I think we will have to move the release/map until after the final e820
map has been sanitized so there are no overlapping regions.

I'll prepare another patch for this.

> That would imply a new patch to your series naturally.
>>
>> Can you remember why this page alignment was required?  I'd like to
> 
> The e820_* calls define how the memory subsystem will use it.
> It ended at some point assuming that the full page is RAM even thought
> it was only half-RAM and tried to use it and blew the machine up.
> 
> The fix was to make the calls to the e820_* with size and regions
> that were page-aligned.
> 
> Anyhow, here is what the bootup looks now:
> 
> [    0.000000] Freeing  9e-a0 pfn range: 2 pages freed
> [    0.000000] 1-1 mapping on 9e->a0
> [    0.000000] Freeing  a0-100 pfn range: 96 pages freed
> [    0.000000] 1-1 mapping on a0->100
> [    0.000000] Freeing  7fff0-80000 pfn range: 16 pages freed
> [    0.000000] 1-1 mapping on 7fff0->80000
> [    0.000000] Freeing  cfef0-cfef5 pfn range: 5 pages freed
> [    0.000000] 1-1 mapping on cfef0->cfef5
> [    0.000000] Freeing  cfef5-cff7f pfn range: 138 pages freed
> [    0.000000] 1-1 mapping on cfef5->cff7f
> [    0.000000] Freeing  cff7f-d0000 pfn range: 129 pages freed
> [    0.000000] 1-1 mapping on cff7f->d0000
> [    0.000000] Freeing  d0000-f0000 pfn range: 131072 pages freed
> [    0.000000] 1-1 mapping on d0000->f0000
> [    0.000000] Freeing  f0000-f4b58 pfn range: 19288 pages freed
> [    0.000000] 1-1 mapping on f0000->fec10
> [    0.000000] 1-1 mapping on fec10->fee01
> [    0.000000] 1-1 mapping on fee01->100000
> [    0.000000] Released 150746 pages of unused memory
> [    0.000000] Set 196994 page(s) to 1-1 mapping
> [    0.000000] BIOS-provided physical RAM map:
> [    0.000000]  Xen: 0000000000000000 - 000000000009d000 (usable)
> [    0.000000]  Xen: 000000000009d800 - 0000000000100000 (reserved)
> [    0.000000]  Xen: 0000000000100000 - 000000007fff0000 (usable)
> [    0.000000]  Xen: 000000007fff0000 - 0000000080000000 (reserved)
> 
> 
>> update the comment with the reason because the bare-metal x86 memory
>> init code doesn't appear to fixup the memory map in this way.
>>
>> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
>> index 986661b..e473c4c 100644
>> --- a/arch/x86/xen/setup.c
>> +++ b/arch/x86/xen/setup.c
>> @@ -178,6 +178,19 @@ static unsigned long __init xen_get_max_pages(void)
>>  	return min(max_pages, MAX_DOMAIN_PAGES);
>>  }
>>
>> +static void xen_e820_add_region(u64 start, u64 size, int type)
>> +{
>> +	u64 end = start + size;
>> +
>> +	/* Align RAM regions to page boundaries. */
>> +	if (type == E820_RAM || type == E820_UNUSABLE) {
> 
> Hm, do we care about E820_UNUSABLE to be page aligned?
> If so, please comment why.

Er. We don't really but I think this if needs to be:

    /*
     * Page align regions.
     *
     * Reduce RAM regions and expand other (reserved) regions.
     */
    if (type == E820_RAM || type == E820_UNUSABLE) {
	start = PAGE_ALIGN(start);
        end  &= ~((u64)PAGE_SIZE - 1);
    } else {
        start &= ~((u64)PAGE_SIZE - 1);
        end = PAGE_ALIGN(start);
    }

So reserved regions also become page aligned (which is part of the fix
for the dmidecode bug).

>> +		start = PAGE_ALIGN(start);
> 
> Is that actually safe? Say it starts a 9ffff? We would
> end up using 9f000 which is not right.

PAGE_ALIGN() (and ALIGN()) round upwards.

David

Re: Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

On Wed, Sep 28, 2011 at 11:45:02AM +0100, David Vrabel wrote:
> On 28/09/11 00:10, Konrad Rzeszutek Wilk wrote:
> >>> (XEN) Xen-e820 RAM map:
> >>> (XEN)  0000000000000000 - 000000000009d800 (usable)
> >>
> >> It's because it's not correctly handling the half-page of RAM at the end
> >> of this region.
> >>
> >> I don't have access to any test boxes with a dodgy BIOS like this so can
> >> you test this patch?  If it works I'll fold it in and post an updated
> >> series.
> > 
> > It works. Albeit I think we are going to hit a problem with dmidecode
> > if the DMI data is right in the reserved region
> > 
> > (http://lists.xensource.com/archives/html/xen-devel/2011-09/msg01299.html)
> > 
> > As in, if it starts in 9D800 - we consider 0->9d as RAM PFN, and 9e->100 as 1-1
> > mapping.
> > 
> > I am thinking that perhaps the call to xen_set_phys_identity, where
> > we call PFN_UP(x) should be replaced with PFN_DOWN(x). That way
> > we would consider 0>9c as RAM PFN and 9D->100 as 1-1 mapping.
> 
> I almost did an equivalent change (see below) but discarded it as it
> would have resulting in overlapping regions and attempting to
> release/map some pages twice.
> 
> I think we will have to move the release/map until after the final e820
> map has been sanitized so there are no overlapping regions.

<nods>Fortunatly for us, the overlap does not happen - they are just
next to each other. BTW, I think Xen hypervisor does the E820 sanitisation
so there shouldn't be any funny entries.

> 
> I'll prepare another patch for this.

OK.
> 
> > That would imply a new patch to your series naturally.
> >>
> >> Can you remember why this page alignment was required?  I'd like to
> > 
> > The e820_* calls define how the memory subsystem will use it.
> > It ended at some point assuming that the full page is RAM even thought
> > it was only half-RAM and tried to use it and blew the machine up.
> > 
> > The fix was to make the calls to the e820_* with size and regions
> > that were page-aligned.
> > 
> > Anyhow, here is what the bootup looks now:
> > 
> > [    0.000000] Freeing  9e-a0 pfn range: 2 pages freed
> > [    0.000000] 1-1 mapping on 9e->a0
> > [    0.000000] Freeing  a0-100 pfn range: 96 pages freed
> > [    0.000000] 1-1 mapping on a0->100
> > [    0.000000] Freeing  7fff0-80000 pfn range: 16 pages freed
> > [    0.000000] 1-1 mapping on 7fff0->80000
> > [    0.000000] Freeing  cfef0-cfef5 pfn range: 5 pages freed
> > [    0.000000] 1-1 mapping on cfef0->cfef5
> > [    0.000000] Freeing  cfef5-cff7f pfn range: 138 pages freed
> > [    0.000000] 1-1 mapping on cfef5->cff7f
> > [    0.000000] Freeing  cff7f-d0000 pfn range: 129 pages freed
> > [    0.000000] 1-1 mapping on cff7f->d0000
> > [    0.000000] Freeing  d0000-f0000 pfn range: 131072 pages freed
> > [    0.000000] 1-1 mapping on d0000->f0000
> > [    0.000000] Freeing  f0000-f4b58 pfn range: 19288 pages freed
> > [    0.000000] 1-1 mapping on f0000->fec10
> > [    0.000000] 1-1 mapping on fec10->fee01
> > [    0.000000] 1-1 mapping on fee01->100000
> > [    0.000000] Released 150746 pages of unused memory
> > [    0.000000] Set 196994 page(s) to 1-1 mapping
> > [    0.000000] BIOS-provided physical RAM map:
> > [    0.000000]  Xen: 0000000000000000 - 000000000009d000 (usable)
> > [    0.000000]  Xen: 000000000009d800 - 0000000000100000 (reserved)
> > [    0.000000]  Xen: 0000000000100000 - 000000007fff0000 (usable)
> > [    0.000000]  Xen: 000000007fff0000 - 0000000080000000 (reserved)
> > 
> > 
> >> update the comment with the reason because the bare-metal x86 memory
> >> init code doesn't appear to fixup the memory map in this way.
> >>
> >> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> >> index 986661b..e473c4c 100644
> >> --- a/arch/x86/xen/setup.c
> >> +++ b/arch/x86/xen/setup.c
> >> @@ -178,6 +178,19 @@ static unsigned long __init xen_get_max_pages(void)
> >>  	return min(max_pages, MAX_DOMAIN_PAGES);
> >>  }
> >>
> >> +static void xen_e820_add_region(u64 start, u64 size, int type)

Might as well call this function "xen_align_and_add_e820_region"

> >> +{
> >> +	u64 end = start + size;
> >> +
> >> +	/* Align RAM regions to page boundaries. */
> >> +	if (type == E820_RAM || type == E820_UNUSABLE) {
> > 
> > Hm, do we care about E820_UNUSABLE to be page aligned?
> > If so, please comment why.
> 
> Er. We don't really but I think this if needs to be:
> 
>     /*
>      * Page align regions.
>      *
>      * Reduce RAM regions and expand other (reserved) regions.
>      */
>     if (type == E820_RAM || type == E820_UNUSABLE) {
> 	start = PAGE_ALIGN(start);
>         end  &= ~((u64)PAGE_SIZE - 1);
>     } else {
>         start &= ~((u64)PAGE_SIZE - 1);
>         end = PAGE_ALIGN(start);
>     }
> 
> So reserved regions also become page aligned (which is part of the fix
> for the dmidecode bug).

<nods> That should be part of a seperate patch (well, the dmidecde
patch). Instead of the "infinite loop, won't boot on Konrad's
machines with non-standard E820".


> 
> >> +		start = PAGE_ALIGN(start);
> > 
> > Is that actually safe? Say it starts a 9ffff? We would
> > end up using 9f000 which is not right.
> 
> PAGE_ALIGN() (and ALIGN()) round upwards.

<smacks his head> Right.

Re: Re: xen: memory initialization/balloon fixes (#3)

[Konrad Rzeszutek Wilk]

> Er. We don't really but I think this if needs to be:
> 
>     /*
>      * Page align regions.
>      *
>      * Reduce RAM regions and expand other (reserved) regions.
>      */
>     if (type == E820_RAM || type == E820_UNUSABLE) {
> 	start = PAGE_ALIGN(start);
>         end  &= ~((u64)PAGE_SIZE - 1);
>     } else {
>         start &= ~((u64)PAGE_SIZE - 1);
>         end = PAGE_ALIGN(start);
>     }
> 
> So reserved regions also become page aligned (which is part of the fix
> for the dmidecode bug).

I am not sure actually that is required for the e820_* calls. As those
are used by 'ioremap' and memory buddy system and they only care about
the RAM regions. Everybody else assumes that the "gaps" and "anything-but
-RAM-regions" are OK - as long as they don't touch the RAM regions.

It certainly is required for the set_phys_to_identity(..) call.

I am trying here to be sure we don't mess it up - and I don't know
what the right answer is for e820_* calls. Well, I do know what the
right answer if for RAM regions - they must be page-aligned. But
for reserved/non-RAM/ACPI/ACPI-NVS... ?

BIOS-e820: 00000000dfe8ac00 - 00000000dfe8cc00 (ACPI NVS)
BIOS-e820: 00000000dfe8cc00 - 00000000dfe8ec00 (ACPI data)
.. snip..
reserve RAM buffer: 00000000dfe8ac00 - 00000000dfffffff

or say:
BIOS-e820: 00000000bff66f00 - 00000000bff76300 (ACPI data)
..
[    1.026860] reserve RAM buffer: 00000000bff66f00 - 00000000bfffffff

They all seem to work OK without being page-aligned.

I think we can drop the page-alignment on non-RAM regions when we
give it to e820_*. We want to diverge as little as possible from what baremetal
does.