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authorAkinobu Mita <akinobu.mita@gmail.com>2009-03-31 18:23:17 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 11:59:13 -0400
commit6a11f75b6a17b5d9ac5025f8d048382fd1f47377 (patch)
treea3415cd897823975b927f89a233d2703bf97ba2b /lib/Kconfig.debug
parent610a77e04a8d9fe8764dc484e2182fa251ce1cc2 (diff)
generic debug pagealloc
CONFIG_DEBUG_PAGEALLOC is now supported by x86, powerpc, sparc64, and s390. This patch implements it for the rest of the architectures by filling the pages with poison byte patterns after free_pages() and verifying the poison patterns before alloc_pages(). This generic one cannot detect invalid page accesses immediately but invalid read access may cause invalid dereference by poisoned memory and invalid write access can be detected after a long delay. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r--lib/Kconfig.debug1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 58bfe7e8faba..9638d99644af 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -796,6 +796,7 @@ config SYSCTL_SYSCALL_CHECK
796 to properly maintain and use. This enables checks that help 796 to properly maintain and use. This enables checks that help
797 you to keep things correct. 797 you to keep things correct.
798 798
799source mm/Kconfig.debug
799source kernel/trace/Kconfig 800source kernel/trace/Kconfig
800 801
801config PROVIDE_OHCI1394_DMA_INIT 802config PROVIDE_OHCI1394_DMA_INIT