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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2011-03-22 16:32:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:02 -0700 |
| commit | 7bc32f6f90dae67730645da67bfd44304f810f93 (patch) | |
| tree | caefa40b2b5563d0e54686b40cb6f6375c2015cb /mm/Kconfig.debug | |
| parent | 1d16871d8c96deadc5f9753b6b096074f2cbcbe1 (diff) | |
| download | lwn-7bc32f6f90dae67730645da67bfd44304f810f93.tar.gz lwn-7bc32f6f90dae67730645da67bfd44304f810f93.zip | |
mm: debug-pagealloc: fix kconfig dependency warning
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>
Diffstat (limited to 'mm/Kconfig.debug')
| -rw-r--r-- | mm/Kconfig.debug | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index af7cfb43d2f0..8b1a477162dc 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -1,27 +1,24 @@ config DEBUG_PAGEALLOC bool "Debug page memory allocations" - depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC - depends on !HIBERNATION || !PPC && !SPARC + depends on DEBUG_KERNEL + depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC depends on !KMEMCHECK + select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC ---help--- Unmap pages from the kernel linear mapping after free_pages(). This results in a large slowdown, but helps to find certain types of memory corruption. + For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC, + fill the pages with poison patterns after free_pages() and verify + the patterns before alloc_pages(). Additionally, + this option cannot be enabled in combination with hibernation as + that would result in incorrect warnings of memory corruption after + a resume because free pages are not saved to the suspend image. + config WANT_PAGE_DEBUG_FLAGS bool config PAGE_POISONING - bool "Debug page memory allocations" - depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC - depends on !HIBERNATION - select DEBUG_PAGEALLOC + bool 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 corruption. - - This option cannot be enabled in combination with hibernation as - that would result in incorrect warnings of memory corruption after - a resume because free pages are not saved to the suspend image. |