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Message-ID: <20090310143857.GB3151@localhost.localdomain> Date: Tue, 10 Mar 2009 23:38:57 +0900 From: Akinobu Mita <akinobu.mita@...il.com> To: linux-kernel@...r.kernel.org Cc: linux-arch@...r.kernel.org, akpm@...ux-foundation.org Subject: [PATCH 2/2 -mmotm] debug-pagealloc: cannot depend on hibernation The generic debug-pagealloc generates wrong messages for the page corruption after hibernation. Because the free pages are not saved to the suspend image. Signed-off-by: Akinobu Mita <akinobu.mita@...il.com> Cc: <linux-arch@...r.kernel.org> --- mm/Kconfig.debug | 5 +++++ 1 file changed, 5 insertions(+) Index: 2.6-mmotm/mm/Kconfig.debug =================================================================== --- 2.6-mmotm.orig/mm/Kconfig.debug +++ 2.6-mmotm/mm/Kconfig.debug @@ -4,9 +4,14 @@ config WANT_PAGE_DEBUG_FLAGS config PAGE_POISONING bool "Debug page memory allocations" depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC + depends on !HIBERNATION select DEBUG_PAGEALLOC select WANT_PAGE_DEBUG_FLAGS help Fill the pages with poison patterns after free_pages() and verify the patterns before alloc_pages(). This results in a large slowdown, but helps to find certain types of memory corruptions. + + This option cannot enalbe with hibernation. Otherwise, it will get + wrong messages for memory corruption because the free pages are not + saved to the suspend image. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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