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| author | Andi Kleen <andi@firstfloor.org> | 2009-09-16 11:50:17 +0200 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-09-16 11:50:17 +0200 |
| commit | 9893e49d64a4874ea67849ee2cfbf3f3d6817573 (patch) | |
| tree | 2bf3c7950cdae1c1ed03a513a6690d95f0c02d5c /include/asm-generic | |
| parent | f590f333fb15444d2971f979d434ecad56c09698 (diff) | |
| download | lwn-9893e49d64a4874ea67849ee2cfbf3f3d6817573.tar.gz lwn-9893e49d64a4874ea67849ee2cfbf3f3d6817573.zip | |
HWPOISON: Add madvise() based injector for hardware poisoned pages v4
Impact: optional, useful for debugging
Add a new madvice sub command to inject poison for some
pages in a process' address space. This is useful for
testing the poison page handling.
This patch can allow root to tie up large amounts of memory.
I got feedback from container developers and they didn't see any
problem.
v2: Use write flag for get_user_pages to make sure to always get
a fresh page
v3: Don't request write mapping (Fengguang Wu)
v4: Move MADV_* number to avoid conflict with KSM (Hugh Dickins)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/mman-common.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h index 3b69ad34189a..c325d1ef42ab 100644 --- a/include/asm-generic/mman-common.h +++ b/include/asm-generic/mman-common.h @@ -34,6 +34,7 @@ #define MADV_REMOVE 9 /* remove these pages & resources */ #define MADV_DONTFORK 10 /* don't inherit across fork */ #define MADV_DOFORK 11 /* do inherit across fork */ +#define MADV_HWPOISON 100 /* poison a page for testing */ /* compatibility flags */ #define MAP_FILE 0 |