linux/mm/Kconfig.debug, branch v3.0.44Linux kernel source treehttps://git.amat.us/linux/atom/mm/Kconfig.debug?h=v3.0.442011-03-23T00:44:02Zmm: debug-pagealloc: fix kconfig dependency warning2011-03-23T00:44:02ZAkinobu Mitaakinobu.mita@gmail.com2011-03-22T23:32:46Zurn:sha1:7bc32f6f90dae67730645da67bfd44304f810f93
Fix kconfig dependency warning to satisfy dependencies:
warning: (PAGE_POISONING) selects DEBUG_PAGEALLOC which has unmet
direct dependencies (DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC &&
(!HIBERNATION || !PPC && !SPARC) && !KMEMCHECK)
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
trivial: improve help text for mm debug config options2009-09-21T13:14:57ZFrans Popelendil@planet.nl2009-07-24T03:31:17Zurn:sha1:22f8b458223151272f6a1e57847b90979958cc7b
Improve the help text for PAGE_POISONING.
Also fix some typos and improve consistency within the file.
Signed-of-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
kmemcheck: enable in the x86 Kconfig2009-06-15T13:49:15ZVegard Nossumvegard.nossum@gmail.com2008-04-03T22:51:41Zurn:sha1:7d46d9e6dbffe8780aa8430a63543d3f7ba92860
let it rip!
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
generic debug pagealloc: build fix2009-04-03T02:04:48ZAkinobu Mitaakinobu.mita@gmail.com2009-04-02T23:56:30Zurn:sha1:ee3b4290aec03022cfb67c9adba9f1b3215245f0
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 architectures
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generic debug pagealloc2009-04-01T15:59:13ZAkinobu Mitaakinobu.mita@gmail.com2009-03-31T22:23:17Zurn:sha1:6a11f75b6a17b5d9ac5025f8d048382fd1f47377
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>