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authorHugh Dickins <hugh@veritas.com>2005-11-07 00:57:57 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:23 -0800
commit2d4b95f06062d590aef8e44d42cec27b1828119f (patch)
tree7beb1c976d3e08a9ef9cb37fa342e2b4f35e6aab
parent732ee21f2894819781766a0cd88e32bdd630d11e (diff)
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op-kernel-dev-2d4b95f06062d590aef8e44d42cec27b1828119f.tar.gz
[PATCH] Suppress split ptlock on arches which may use one page for multiple page tables
Suppress split ptlock on arches which may use one page for multiple page tables. Reconsider what better to do (particularly on ppc64) later on. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--mm/Kconfig2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 1a4473fc..ae9ce6b 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -126,9 +126,11 @@ comment "Memory hotplug is currently incompatible with Software Suspend"
# 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's debug spinlock_t is too large for the 32-bit struct page.
+# ARM26 and SPARC32 and PPC64 may use one page for multiple page tables.
#
config SPLIT_PTLOCK_CPUS
int
default "4096" if ARM && !CPU_CACHE_VIPT
default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
+ default "4096" if ARM26 || SPARC32 || PPC64
default "4"
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