diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2009-03-31 18:23:17 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-01 11:59:13 -0400 |
| commit | 6a11f75b6a17b5d9ac5025f8d048382fd1f47377 (patch) | |
| tree | a3415cd897823975b927f89a233d2703bf97ba2b /lib | |
| parent | 610a77e04a8d9fe8764dc484e2182fa251ce1cc2 (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')
| -rw-r--r-- | lib/Kconfig.debug | 1 |
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 | ||
| 799 | source mm/Kconfig.debug | ||
| 799 | source kernel/trace/Kconfig | 800 | source kernel/trace/Kconfig |
| 800 | 801 | ||
| 801 | config PROVIDE_OHCI1394_DMA_INIT | 802 | config PROVIDE_OHCI1394_DMA_INIT |