From: Sasha Levin <sasha.levin@oracle.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
hughd@google.com, mgorman@suse.de,
Sasha Levin <sasha.levin@oracle.com>
Subject: [PATCH 1/5] mm: add poisoning basics
Date: Mon, 29 Sep 2014 21:47:15 -0400 [thread overview]
Message-ID: <1412041639-23617-2-git-send-email-sasha.levin@oracle.com> (raw)
In-Reply-To: <1412041639-23617-1-git-send-email-sasha.levin@oracle.com>
Add poisining basics along with a config option to enable poisoning.
Signed-off-by: Sasha Levin <sasha.levin@oracle.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
--
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next prev parent reply other threads:[~2014-09-30 1:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-30 1:47 [PATCH 0/5] mm: poison critical mm/ structs Sasha Levin
2014-09-30 1:47 ` Sasha Levin [this message]
2014-09-30 1:47 ` [PATCH 2/5] mm: constify dump_page and friends Sasha Levin
2014-09-30 1:47 ` [PATCH 3/5] mm: poison mm_struct Sasha Levin
2014-09-30 1:47 ` [PATCH 4/5] mm: poison vm_area_struct Sasha Levin
2014-09-30 1:47 ` [PATCH 5/5] mm: poison page struct Sasha Levin
2014-10-07 22:02 ` Dave Hansen
2014-10-08 7:10 ` Christoph Lameter
2014-10-08 14:22 ` Sasha Levin
2014-10-01 21:07 ` [PATCH 0/5] mm: poison critical mm/ structs Andrew Morton
2014-10-01 21:39 ` Sasha Levin
2014-10-01 21:48 ` Andrew Morton
2014-10-02 3:51 ` Sasha Levin
2014-10-02 9:23 ` Hugh Dickins
2014-10-02 14:58 ` Sasha Levin
2014-10-07 22:16 ` Dave Hansen
2014-10-08 16:43 ` Sasha Levin
2014-10-02 15:13 ` Dave Jones
2014-10-09 19:11 ` Sasha Levin
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