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Commit 30520864 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

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: default avatarChristoph Lameter <clameter@sgi.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 614410d5

arch/powerpc/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -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