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authorHugh Dickins <hugh@veritas.com>2007-05-09 14:38:48 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-09 16:35:00 +1000
commit517e22638c282bb07c52a11f928961ed4822196b (patch)
tree7eab8eb1242ee18f75c325077f26bdcb86133512 /arch/powerpc/Kconfig
parent[POWERPC] Spufs support for 64K LS mappings on 4K kernels (diff)
downloadlinux-dev-517e22638c282bb07c52a11f928961ed4822196b.tar.xz
linux-dev-517e22638c282bb07c52a11f928961ed4822196b.zip
[POWERPC] Don't use SLAB/SLUB for PTE pages
The SLUB allocator relies on struct page fields first_page and slab, overwritten by ptl when SPLIT_PTLOCK: so the SLUB allocator cannot then be used for the lowest level of pagetable pages. This was obstructing SLUB on PowerPC, which uses kmem_caches for its pagetables. So convert its pte level to use normal gfp pages (whereas pmd, pud and 64k-page pgd want partpages, so continue to use kmem_caches for pmd, pud and pgd). Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig13
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index ecd459dd1baf..ccc5410af996 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -120,19 +120,6 @@ config GENERIC_BUG
config SYS_SUPPORTS_APM_EMULATION
bool
-#
-# 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