HWPOISON: comment the possible set_page_dirty() race

[safe/jmp/linux-2.6] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index 77b4980..2310984 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -158,11 +158,13 @@ config PAGEFLAGS_EXTENDED
 # Default to 4 for wider testing, though 8 might be more appropriate.
 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
 # PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
 # Default to 4 for wider testing, though 8 might be more appropriate.
 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
 # PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.

+# DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC spinlock_t also enlarge struct page.

 #
 config SPLIT_PTLOCK_CPUS
        int
 #
 config SPLIT_PTLOCK_CPUS
        int

-       default "4096" if ARM && !CPU_CACHE_VIPT
-       default "4096" if PARISC && !PA20
+       default "999999" if ARM && !CPU_CACHE_VIPT
+       default "999999" if PARISC && !PA20
+       default "999999" if DEBUG_SPINLOCK || DEBUG_LOCK_ALLOC

        default "4"
 
 #
        default "4"
 
 #


@@ -210,7 +212,7 @@ config KSM
          Enable Kernel Samepage Merging: KSM periodically scans those areas
          of an application's address space that an app has advised may be
          mergeable.  When it finds pages of identical content, it replaces
          Enable Kernel Samepage Merging: KSM periodically scans those areas
          of an application's address space that an app has advised may be
          mergeable.  When it finds pages of identical content, it replaces

-         the many instances by a single resident page with that content, so
+         the many instances by a single page with that content, so

          saving memory until one or another app needs to modify the content.
          Recommended for use with KVM, or with other duplicative applications.
          See Documentation/vm/ksm.txt for more information: KSM is inactive
          saving memory until one or another app needs to modify the content.
          Recommended for use with KVM, or with other duplicative applications.
          See Documentation/vm/ksm.txt for more information: KSM is inactive