01 Nov, 2011

3 commits

• 64212ec56   debug-pagealloc: add support for highmem pages ... Browse Code »

  This adds support for highmem pages poisoning and verification to the
  debug-pagealloc feature for no-architecture support.

  [akpm@linux-foundation.org: remove unneeded preempt_disable/enable]
  Signed-off-by: Akinobu Mita
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Akinobu Mita

  2011-11-01 08:30:48 +0800  
• 8c5fb8ead   mm/debug-pagealloc.c: use memchr_inv ... Browse Code »

  Use newly introduced memchr_inv() for page verification.

  Signed-off-by: Akinobu Mita
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Akinobu Mita

  2011-11-01 08:30:47 +0800  
• 77311139f   mm/debug-pagealloc.c: use plain __ratelimit() instead of printk_ratelimit() ... Browse Code »

  printk_ratelimit() should not be used, because it shares ratelimiting
  state with all other unrelated printk_ratelimit() callsites.

  Signed-off-by: Akinobu Mita
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Akinobu Mita

  2011-11-01 08:30:47 +0800  

01 Apr, 2009

1 commit

• 6a11f75b6   generic debug pagealloc ... Browse Code »

  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
  Cc:
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Akinobu Mita

  2009-04-01 23:59:13 +0800