From 9893e49d64a4874ea67849ee2cfbf3f3d6817573 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 16 Sep 2009 11:50:17 +0200 Subject: 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 --- include/asm-generic/mman-common.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-generic') 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 -- cgit v1.2.3-58-ga151