From 30520864839dc796fd314812e7036e754880b47d Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Sun, 6 May 2007 14:49:38 -0700 Subject: PowerPC: Disable SLUB for configurations in which slab page structs are modified PowerPC uses the slab allocator to manage the lowest level of the page table. In high cpu configurations we also use the page struct to split the page table lock. Disallow the selection of SLUB for that case. Signed-off-by: Christoph Lameter Cc: Hugh Dickins Cc: Paul Mackerras Acked-by: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a54a9a2e..8de5f9f 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -117,6 +117,19 @@ config GENERIC_BUG default y depends on BUG +# +# Powerpc uses the slab allocator to manage its ptes and the +# page structs of ptes are used for splitting the page table +# lock for configurations supporting more than SPLIT_PTLOCK_CPUS. +# +# In that special configuration the page structs of slabs are modified. +# This setting disables the selection of SLUB as a slab allocator. +# +config ARCH_USES_SLAB_PAGE_STRUCT + bool + default y + depends on SPLIT_PTLOCK_CPUS <= NR_CPUS + config DEFAULT_UIMAGE bool help -- cgit v0.10.2