|author||James Bottomley <James.Bottomley@HansenPartnership.com>||2011-04-19 16:29:36 -0500|
|committer||Greg Kroah-Hartman <firstname.lastname@example.org>||2011-05-02 09:19:43 -0700|
slub: fix panic with DISCONTIGMEM
commit 4a5fa3590f09999f6db41bc386bce40848fa9f63 upstream. Slub makes assumptions about page_to_nid() which are violated by DISCONTIGMEM and !NUMA. This violation results in a panic because page_to_nid() can be non-zero for pages in the discontiguous ranges and this leads to a null return by get_node(). The assertion by the maintainer is that DISCONTIGMEM should only be allowed when NUMA is also defined. However, at least six architectures: alpha, ia64, m32r, m68k, mips, parisc violate this. The panic is a regression against slab, so just mark slub broken in the problem configuration to prevent users reporting these panics. Acked-by: David Rientjes <email@example.com> Acked-by: Pekka Enberg <firstname.lastname@example.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Greg Kroah-Hartman <email@example.com>
Diffstat (limited to 'init')
1 files changed, 1 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index be788c0957d..47dd02f4d9c 100644
@@ -1209,6 +1209,7 @@ config SLAB
per cpu and per node queues.
+ depends on BROKEN || NUMA || !DISCONTIGMEM
bool "SLUB (Unqueued Allocator)"
SLUB is a slab allocator that minimizes cache line usage