The patch titled
debug-pagealloc: cannot depend on hibernation
has been added to the -mm tree. Its filename is
generic-debug-pagealloc-cannot-depend-on-hibernation.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: debug-pagealloc: cannot depend on hibernation
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
The generic debug-pagealloc generates wrong messages for the page
corruption after hibernation. Because the free pages are not saved to the
suspend image.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/Kconfig.debug | 5 +++++
1 file changed, 5 insertions(+)
diff -puN mm/Kconfig.debug~generic-debug-pagealloc-cannot-depend-on-hibernation mm/Kconfig.debug
--- a/mm/Kconfig.debug~generic-debug-pagealloc-cannot-depend-on-hibernation
+++ a/mm/Kconfig.debug
@@ -4,9 +4,14 @@ config WANT_PAGE_DEBUG_FLAGS
config PAGE_POISONING
bool "Debug page memory allocations"
depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC
+ depends on !HIBERNATION
select DEBUG_PAGEALLOC
select WANT_PAGE_DEBUG_FLAGS
help
Fill the pages with poison patterns after free_pages() and verify
the patterns before alloc_pages(). This results in a large slowdown,
but helps to find certain types of memory corruptions.
+
+ This option cannot enalbe with hibernation. Otherwise, it will get
+ wrong messages for memory corruption because the free pages are not
+ saved to the suspend image.
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
generic-debug-pagealloc-v4.patch
generic-debug-pagealloc-depend-on-config_debug_kernel.patch
generic-debug-pagealloc-cannot-depend-on-hibernation.patch
loop-add-ioctl-to-resize-a-loop-device.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
