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Message-Id: <1412041639-23617-2-git-send-email-sasha.levin@oracle.com> Date: Mon, 29 Sep 2014 21:47:15 -0400 From: Sasha Levin <sasha.levin@...cle.com> To: akpm@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, hughd@...gle.com, mgorman@...e.de, Sasha Levin <sasha.levin@...cle.com> Subject: [PATCH 1/5] mm: add poisoning basics Add poisining basics along with a config option to enable poisoning. Signed-off-by: Sasha Levin <sasha.levin@...cle.com> --- include/linux/poison.h | 6 ++++++ lib/Kconfig.debug | 9 +++++++++ 2 files changed, 15 insertions(+) diff --git a/include/linux/poison.h b/include/linux/poison.h index 2110a81..db4d03e 100644 --- a/include/linux/poison.h +++ b/include/linux/poison.h @@ -86,4 +86,10 @@ /********** sound/oss/ **********/ #define OSS_POISON_FREE 0xAB +/********** include/linux/mm_types.h **********/ +#ifdef CONFIG_DEBUG_VM_POISON +#define MM_POISON_BEGIN 0x89ABCDEF +#define MM_POISON_END 0xFEDCBA98 +#endif /* DEBUG_VM_POISON */ + #endif diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c366c8a..3b82772 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -543,6 +543,15 @@ config DEBUG_VM_RB If unsure, say N. +config DEBUG_VM_POISON + bool "Poison VM structures" + depends on DEBUG_VM + help + Add poison to the beggining and end of various VM structure to + detect memory corruption in VM management code. + + If unsure, say N. + config DEBUG_VIRTUAL bool "Debug VM translations" depends on DEBUG_KERNEL && X86 -- 1.9.1 -- 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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