user/sven/linux.git/mm/debug-pagealloc.c, branch v3.4.93Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v3.4.932011-12-06T08:24:07Zmm, x86: Remove debug_pagealloc_enabled2011-12-06T08:24:07ZStanislaw Gruszkasgruszka@redhat.com2011-11-29T16:05:11Zurn:sha1:54c29c635ae91f5d75ced7bffeaa77ba37ca02bb
When (no)bootmem finish operation, it pass pages to buddy
allocator. Since debug_pagealloc_enabled is not set, we will do
not protect pages, what is not what we want with
CONFIG_DEBUG_PAGEALLOC=y.
To fix remove debug_pagealloc_enabled. That variable was
introduced by commit 12d6f21e "x86: do not PSE on
CONFIG_DEBUG_PAGEALLOC=y" to get more CPA (change page
attribude) code testing. But currently we have CONFIG_CPA_DEBUG,
which test CPA.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1322582711-14571-1-git-send-email-sgruszka@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
debug-pagealloc: add support for highmem pages2011-11-01T00:30:48ZAkinobu Mitaakinobu.mita@gmail.com2011-11-01T00:08:38Zurn:sha1:64212ec569bfdd094f7a23d9b09862209a983559
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 <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/debug-pagealloc.c: use memchr_inv2011-11-01T00:30:47ZAkinobu Mitaakinobu.mita@gmail.com2011-11-01T00:08:10Zurn:sha1:8c5fb8eadde41f67c61a7ac2d3246dab87bf7020
Use newly introduced memchr_inv() for page verification.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/debug-pagealloc.c: use plain __ratelimit() instead of printk_ratelimit()2011-11-01T00:30:47ZAkinobu Mitaakinobu.mita@gmail.com2011-11-01T00:08:05Zurn:sha1:77311139f364d7f71fc9ba88f59fd90e60205007
printk_ratelimit() should not be used, because it shares ratelimiting
state with all other unrelated printk_ratelimit() callsites.
Signed-off-by: Akinobu Mita <akinobu.mita@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>