From 2d4b95f06062d590aef8e44d42cec27b1828119f Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 7 Nov 2005 00:57:57 -0800 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/Kconfig b/mm/Kconfig index 1a4473fcb2ca..ae9ce6b73e8a 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" -- 2.20.1