|author||James Bottomley <James.Bottomley@HansenPartnership.com>||2011-04-19 16:29:36 -0500|
|committer||James Bottomley <James.Bottomley@suse.de>||2011-04-22 15:42:46 -0500|
|parent||[PARISC] set memory ranges in N_NORMAL_MEMORY when onlined (diff)|
[PARISC] slub: fix panic with DISCONTIGMEM
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. Cc: firstname.lastname@example.org Acked-by: David Rientjes <email@example.com> Acked-by: Pekka Enberg <firstname.lastname@example.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'init/Kconfig')
1 files changed, 1 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 56240e724d9a..a7ad8fbdb564 100644
@@ -1226,6 +1226,7 @@ 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