From 478c5ffc0b50527bd2390f2daa46cc16276b8413 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 16 Dec 2009 12:19:59 +0100 Subject: HWPOISON: add page flags filter When specified, only poison pages if ((page_flags & mask) == value). - corrupt-filter-flags-mask - corrupt-filter-flags-value This allows stress testing of many kinds of pages. Strictly speaking, the buddy pages requires taking zone lock, to avoid setting PG_hwpoison on a "was buddy but now allocated to someone" page. However we can just do nothing because we set PG_locked in the beginning, this prevents the page allocator from allocating it to someone. (It will BUG() on the unexpected PG_locked, which is fine for hwpoison testing.) [AK: Add select PROC_PAGE_MONITOR to satisfy dependency] CC: Nick Piggin Signed-off-by: Wu Fengguang Signed-off-by: Andi Kleen --- mm/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'mm/Kconfig') diff --git a/mm/Kconfig b/mm/Kconfig index 2310984591ed..8cea7fde06e1 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -253,6 +253,7 @@ config MEMORY_FAILURE config HWPOISON_INJECT tristate "Poison pages injector" depends on MEMORY_FAILURE && DEBUG_KERNEL + select PROC_PAGE_MONITOR config NOMMU_INITIAL_TRIM_EXCESS int "Turn on mmap() excess space trimming before booting" -- cgit v1.2.1