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| author | Hugh Dickins <hugh@veritas.com> | 2007-05-09 14:38:48 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-09 16:35:00 +1000 |
| commit | 517e22638c282bb07c52a11f928961ed4822196b (patch) | |
| tree | 7eab8eb1242ee18f75c325077f26bdcb86133512 /arch/powerpc/Kconfig | |
| parent | f1fa74f4afe96b0e4ac2beaa61fa4f4667acdcbb (diff) | |
| download | blackbird-op-linux-517e22638c282bb07c52a11f928961ed4822196b.tar.gz blackbird-op-linux-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/Kconfig | 13 |
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 |
