Commit 2d4b95f0 authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds

[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: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 732ee21f
...@@ -126,9 +126,11 @@ comment "Memory hotplug is currently incompatible with Software Suspend" ...@@ -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. # 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. # 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. # 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 config SPLIT_PTLOCK_CPUS
int int
default "4096" if ARM && !CPU_CACHE_VIPT default "4096" if ARM && !CPU_CACHE_VIPT
default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
default "4096" if ARM26 || SPARC32 || PPC64
default "4" default "4"
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