Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [2/16] HWPOISON: Export poison flag in /proc/kpageflags | Date | Fri, 29 May 2009 23:35:27 +0200 (CEST) |
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From: Fengguang Wu <fengguang.wu@intel.com>
Export the new poison flag in /proc/kpageflags. Poisoned pages are moderately interesting even for administrators, so export them here. Also useful for debugging.
AK: I extracted this out of a larger patch from Fengguang Wu.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- fs/proc/page.c | 4 ++++ 1 file changed, 4 insertions(+)
Index: linux/fs/proc/page.c =================================================================== --- linux.orig/fs/proc/page.c 2009-05-29 23:32:10.000000000 +0200 +++ linux/fs/proc/page.c 2009-05-29 23:32:10.000000000 +0200 @@ -79,6 +79,7 @@ #define KPF_WRITEBACK 8 #define KPF_RECLAIM 9 #define KPF_BUDDY 10 +#define KPF_HWPOISON 11 #define kpf_copy_bit(flags, dstpos, srcpos) (((flags >> srcpos) & 1) << dstpos) @@ -118,6 +119,9 @@ kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); +#ifdef CONFIG_MEMORY_FAILURE + uflags |= kpf_copy_bit(kflags, KPF_HWPOISON, PG_hwpoison); +#endif if (put_user(uflags, out++)) { ret = -EFAULT;
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