21 Sep, 2009
1 commit
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Improve the help text for PAGE_POISONING.
Also fix some typos and improve consistency within the file.Signed-of-by: Frans Pop
Signed-off-by: Jiri Kosina
15 Jun, 2009
1 commit
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let it rip!
Signed-off-by: Pekka Enberg
Signed-off-by: Ingo Molnar[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum
03 Apr, 2009
1 commit
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This fixes a build failure with generic debug pagealloc:
mm/debug-pagealloc.c: In function 'set_page_poison':
mm/debug-pagealloc.c:8: error: 'struct page' has no member named 'debug_flags'
mm/debug-pagealloc.c: In function 'clear_page_poison':
mm/debug-pagealloc.c:13: error: 'struct page' has no member named 'debug_flags'
mm/debug-pagealloc.c: In function 'page_poison':
mm/debug-pagealloc.c:18: error: 'struct page' has no member named 'debug_flags'
mm/debug-pagealloc.c: At top level:
mm/debug-pagealloc.c:120: error: redefinition of 'kernel_map_pages'
include/linux/mm.h:1278: error: previous definition of 'kernel_map_pages' was here
mm/debug-pagealloc.c: In function 'kernel_map_pages':
mm/debug-pagealloc.c:122: error: 'debug_pagealloc_enabled' undeclared (first use in this function)by fixing
- debug_flags should be in struct page
- define DEBUG_PAGEALLOC config option for all architecturesSigned-off-by: Akinobu Mita
Reported-by: Alexander Beregalov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Apr, 2009
1 commit
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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