[PATCH] Suppress split ptlock on arches which may use one page for mu…

…ltiple 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 <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
jimmycarry · Nov 7, 2005 · 2d4b95f · 2d4b95f
1 parent 732ee21
commit 2d4b95f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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"