HWPOISON: Add a madvise() injector for soft page offlining

Process based injection is much easier to handle for test programs,
who can first bring a page into a specific state and then test.
So add a new MADV_SOFT_OFFLINE to soft offline a page, similar
to the existing hard offline injector.

Signed-off-by: Andi Kleen <ak@linux.intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h
index 20111265afd8..3da9e2742fa0 100644
--- a/include/asm-generic/mman-common.h
+++ b/include/asm-generic/mman-common.h
@@ -40,6 +40,7 @@
 #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 */
+#define MADV_SOFT_OFFLINE 101           /* soft offline page for testing */
 
 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */