* [PATCH 4/5] xen/i386: reserve Xen pagetables
@ 2009-05-07 18:56 Jeremy Fitzhardinge
2009-05-08 9:07 ` tip-bot for Jeremy Fitzhardinge
0 siblings, 1 reply; 3+ messages in thread
From: Jeremy Fitzhardinge @ 2009-05-07 18:56 UTC (permalink / raw)
To: Linus Torvalds
Cc: Ingo Molnar, the arch/x86 maintainers, Linux Kernel Mailing List,
Xen-devel
The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/xen/mmu.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9842b12..e25a78e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1794,6 +1794,11 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));
+ reserve_early(__pa(xen_start_info->pt_base),
+ __pa(xen_start_info->pt_base +
+ xen_start_info->nr_pt_frames * PAGE_SIZE),
+ "XEN PAGETABLES");
+
return swapper_pg_dir;
}
#endif /* CONFIG_X86_64 */
--
1.6.0.6
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [tip:x86/urgent] x86: xen, i386: reserve Xen pagetables
2009-05-07 18:56 [PATCH 4/5] xen/i386: reserve Xen pagetables Jeremy Fitzhardinge
@ 2009-05-08 9:07 ` tip-bot for Jeremy Fitzhardinge
0 siblings, 0 replies; 3+ messages in thread
From: tip-bot for Jeremy Fitzhardinge @ 2009-05-08 9:07 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, torvalds, jeremy.fitzhardinge, jeremy,
bdonlan, tglx, mingo, xen-devel
Commit-ID: 33df4db04a79660150e1948e3296eeb451ac121b
Gitweb: http://git.kernel.org/tip/33df4db04a79660150e1948e3296eeb451ac121b
Author: Jeremy Fitzhardinge <jeremy@goop.org>
AuthorDate: Thu, 7 May 2009 11:56:44 -0700
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Fri, 8 May 2009 10:49:11 +0200
x86: xen, i386: reserve Xen pagetables
The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.
[ Impact: fix Xen guest crash ]
Also-Bisected-by: Bryan Donlan <bdonlan@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4A032EEC.30509@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/xen/mmu.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9842b12..e25a78e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1794,6 +1794,11 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));
+ reserve_early(__pa(xen_start_info->pt_base),
+ __pa(xen_start_info->pt_base +
+ xen_start_info->nr_pt_frames * PAGE_SIZE),
+ "XEN PAGETABLES");
+
return swapper_pg_dir;
}
#endif /* CONFIG_X86_64 */
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [tip:x86/urgent] x86: xen, i386: reserve Xen pagetables
@ 2009-05-08 9:07 ` tip-bot for Jeremy Fitzhardinge
0 siblings, 0 replies; 3+ messages in thread
From: tip-bot for Jeremy Fitzhardinge @ 2009-05-08 9:07 UTC (permalink / raw)
To: linux-tip-commits
Cc: xen-devel, jeremy, jeremy.fitzhardinge, bdonlan, linux-kernel,
mingo, hpa, tglx, torvalds, mingo
Commit-ID: 33df4db04a79660150e1948e3296eeb451ac121b
Gitweb: http://git.kernel.org/tip/33df4db04a79660150e1948e3296eeb451ac121b
Author: Jeremy Fitzhardinge <jeremy@goop.org>
AuthorDate: Thu, 7 May 2009 11:56:44 -0700
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Fri, 8 May 2009 10:49:11 +0200
x86: xen, i386: reserve Xen pagetables
The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.
[ Impact: fix Xen guest crash ]
Also-Bisected-by: Bryan Donlan <bdonlan@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4A032EEC.30509@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/xen/mmu.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9842b12..e25a78e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1794,6 +1794,11 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));
+ reserve_early(__pa(xen_start_info->pt_base),
+ __pa(xen_start_info->pt_base +
+ xen_start_info->nr_pt_frames * PAGE_SIZE),
+ "XEN PAGETABLES");
+
return swapper_pg_dir;
}
#endif /* CONFIG_X86_64 */
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2009-05-08 9:09 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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