From: David Hildenbrand <david@redhat.com>
To: stable@vger.kernel.org
Cc: linux-mm@kvack.org, Michal Hocko <mhocko@suse.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Baoquan He <bhe@redhat.com>,
Dan Williams <dan.j.williams@intel.com>,
Oscar Salvador <osalvador@suse.de>,
Wei Yang <richard.weiyang@gmail.com>,
David Hildenbrand <david@redhat.com>
Subject: [PATCH for 4.19-stable v2 05/24] mm, memory_hotplug: add nid parameter to arch_remove_memory
Date: Tue, 21 Jan 2020 19:01:31 +0100 [thread overview]
Message-ID: <20200121180150.37454-6-david@redhat.com> (raw)
In-Reply-To: <20200121180150.37454-1-david@redhat.com>
commit 2c2a5af6fed20cf74401c9d64319c76c5ff81309 upstream.
-- snip --
Missing unification of mm/hmm.c and kernel/memremap.c
-- snip --
Patch series "Do not touch pages in hot-remove path", v2.
This patchset aims for two things:
1) A better definition about offline and hot-remove stage
2) Solving bugs where we can access non-initialized pages
during hot-remove operations [2] [3].
This is achieved by moving all page/zone handling to the offline
stage, so we do not need to access pages when hot-removing memory.
[1] https://patchwork.kernel.org/cover/10691415/
[2] https://patchwork.kernel.org/patch/10547445/
[3] https://www.spinics.net/lists/linux-mm/msg161316.html
This patch (of 5):
This is a preparation for the following-up patches. The idea of passing
the nid is that it will allow us to get rid of the zone parameter
afterwards.
Link: http://lkml.kernel.org/r/20181127162005.15833-2-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
arch/ia64/mm/init.c | 2 +-
arch/powerpc/mm/mem.c | 3 ++-
arch/s390/mm/init.c | 2 +-
arch/sh/mm/init.c | 2 +-
arch/x86/mm/init_32.c | 2 +-
arch/x86/mm/init_64.c | 3 ++-
include/linux/memory_hotplug.h | 4 ++--
kernel/memremap.c | 5 ++++-
mm/hmm.c | 4 +++-
mm/memory_hotplug.c | 2 +-
10 files changed, 18 insertions(+), 11 deletions(-)
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 3b85c3ecac38..b54d0ee74b53 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -662,7 +662,7 @@ int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 9a6afd9f3f9b..1b6e0ef5d14d 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -140,7 +140,8 @@ int __meminit arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int __meminit arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int __meminit arch_remove_memory(int nid, u64 start, u64 size,
+ struct vmem_altmap *altmap)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 3fa3e5323612..bc49b560625e 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -240,7 +240,7 @@ int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap)
{
/*
* There is no hardware or firmware interface which could trigger a
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 7713c084d040..5c91bb6abc35 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -444,7 +444,7 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap)
{
unsigned long start_pfn = PFN_DOWN(start);
unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 979e0a02cbe1..9fa503f2f56c 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -861,7 +861,7 @@ int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-int arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index a3e9c6ee3cf2..32066d5dc9af 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1142,7 +1142,8 @@ kernel_physical_mapping_remove(unsigned long start, unsigned long end)
remove_pagetable(start, end, true, NULL);
}
-int __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
+int __ref arch_remove_memory(int nid, u64 start, u64 size,
+ struct vmem_altmap *altmap)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 008e5281e7d7..df77a7597aba 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -109,8 +109,8 @@ static inline bool movable_node_is_enabled(void)
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-extern int arch_remove_memory(u64 start, u64 size,
- struct vmem_altmap *altmap);
+extern int arch_remove_memory(int nid, u64 start, u64 size,
+ struct vmem_altmap *altmap);
extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages, struct vmem_altmap *altmap);
#endif /* CONFIG_MEMORY_HOTREMOVE */
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 7c5fb8a208ac..2ee2e672d5fc 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -121,6 +121,7 @@ static void devm_memremap_pages_release(void *data)
struct resource *res = &pgmap->res;
resource_size_t align_start, align_size;
unsigned long pfn;
+ int nid;
pgmap->kill(pgmap->ref);
for_each_device_pfn(pfn, pgmap)
@@ -131,13 +132,15 @@ static void devm_memremap_pages_release(void *data)
align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
- align_start;
+ nid = page_to_nid(pfn_to_page(align_start >> PAGE_SHIFT));
+
mem_hotplug_begin();
if (pgmap->type == MEMORY_DEVICE_PRIVATE) {
pfn = align_start >> PAGE_SHIFT;
__remove_pages(page_zone(pfn_to_page(pfn)), pfn,
align_size >> PAGE_SHIFT, NULL);
} else {
- arch_remove_memory(align_start, align_size,
+ arch_remove_memory(nid, align_start, align_size,
pgmap->altmap_valid ? &pgmap->altmap : NULL);
kasan_remove_zero_shadow(__va(align_start), align_size);
}
diff --git a/mm/hmm.c b/mm/hmm.c
index 57f0d2a4ff34..ae1f6ad46d30 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -999,6 +999,7 @@ static void hmm_devmem_release(void *data)
unsigned long start_pfn, npages;
struct zone *zone;
struct page *page;
+ int nid;
/* pages are dead and unused, undo the arch mapping */
start_pfn = (resource->start & ~(PA_SECTION_SIZE - 1)) >> PAGE_SHIFT;
@@ -1006,12 +1007,13 @@ static void hmm_devmem_release(void *data)
page = pfn_to_page(start_pfn);
zone = page_zone(page);
+ nid = page_to_nid(page);
mem_hotplug_begin();
if (resource->desc == IORES_DESC_DEVICE_PRIVATE_MEMORY)
__remove_pages(zone, start_pfn, npages, NULL);
else
- arch_remove_memory(start_pfn << PAGE_SHIFT,
+ arch_remove_memory(nid, start_pfn << PAGE_SHIFT,
npages << PAGE_SHIFT, NULL);
mem_hotplug_done();
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index c109e3f0bc16..a51e5ffdaa04 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1916,7 +1916,7 @@ void __ref __remove_memory(int nid, u64 start, u64 size)
memblock_free(start, size);
memblock_remove(start, size);
- arch_remove_memory(start, size, NULL);
+ arch_remove_memory(nid, start, size, NULL);
try_offline_node(nid);
--
2.24.1
next prev parent reply other threads:[~2020-01-21 18:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-21 18:01 [PATCH for 4.19-stable v2 00/24] mm/memory_hotplug: backport of pending stable fixes David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 01/24] mm/memory_hotplug: make remove_memory() take the device_hotplug_lock David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 02/24] mm, sparse: drop pgdat_resize_lock in sparse_add/remove_one_section() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 03/24] mm, sparse: pass nid instead of pgdat to sparse_add_one_section() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 04/24] drivers/base/memory.c: remove an unnecessary check on NR_MEM_SECTIONS David Hildenbrand
2020-01-21 18:01 ` David Hildenbrand [this message]
2020-01-22 9:25 ` [PATCH for 4.19-stable v2 05/24] mm, memory_hotplug: add nid parameter to arch_remove_memory David Hildenbrand
2020-01-24 9:23 ` Greg Kroah-Hartman
2020-01-24 9:24 ` David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 06/24] mm/memory_hotplug: release memory resource after arch_remove_memory() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 07/24] drivers/base/memory.c: clean up relics in function parameters David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 08/24] mm, memory_hotplug: update a comment in unregister_memory() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 09/24] mm/memory_hotplug: make unregister_memory_section() never fail David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 10/24] mm/memory_hotplug: make __remove_section() " David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 11/24] powerpc/mm: Fix section mismatch warning David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 12/24] mm/memory_hotplug: make __remove_pages() and arch_remove_memory() never fail David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 13/24] s390x/mm: implement arch_remove_memory() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 14/24] mm/memory_hotplug: allow arch_remove_memory() without CONFIG_MEMORY_HOTREMOVE David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 15/24] drivers/base/memory: pass a block_id to init_memory_block() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 16/24] mm/memory_hotplug: create memory block devices after arch_add_memory() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 17/24] mm/memory_hotplug: remove memory block devices before arch_remove_memory() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 18/24] mm/memory_hotplug: make unregister_memory_block_under_nodes() never fail David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 19/24] mm/memory_hotplug: remove "zone" parameter from sparse_remove_one_section David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 20/24] mm/hotplug: kill is_dev_zone() usage in __remove_pages() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 21/24] drivers/base/node.c: simplify unregister_memory_block_under_nodes() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 22/24] mm/memunmap: don't access uninitialized memmap in memunmap_pages() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 23/24] mm/memory_hotplug: fix try_offline_node() David Hildenbrand
2020-01-21 18:01 ` [PATCH for 4.19-stable v2 24/24] mm/memory_hotplug: shrink zones when offlining memory David Hildenbrand
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200121180150.37454-6-david@redhat.com \
--to=david@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.ibm.com \
--cc=bhe@redhat.com \
--cc=dan.j.williams@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=osalvador@suse.de \
--cc=richard.weiyang@gmail.com \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).