Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [7/16] HWPOISON: Add various poison checks in mm/memory.c | Date | Wed, 27 May 2009 22:12:33 +0200 (CEST) |
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Bail out early when hardware poisoned pages are found in page fault handling. Since they are poisoned they should not be mapped freshly into processes, because that would cause another (potentially deadly) machine check
This is generally handled in the same way as OOM, just a different error code is returned to the architecture code.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- mm/memory.c | 3 +++ 1 file changed, 3 insertions(+)
Index: linux/mm/memory.c =================================================================== --- linux.orig/mm/memory.c 2009-05-27 21:14:21.000000000 +0200 +++ linux/mm/memory.c 2009-05-27 21:14:21.000000000 +0200 @@ -2659,6 +2659,9 @@ if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) return ret; + if (unlikely(PageHWPoison(vmf.page))) + return VM_FAULT_HWPOISON; + /* * For consistency in subsequent calls, make the faulted page always * locked.
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