commit: 4a5fa3590f09999f6db41bc386bce40848fa9f63 From: James Bottomley <[email protected]> Date: Tue, 19 Apr 2011 16:29:36 -0500 Subject: [PATCH] [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: [email protected] Acked-by: David Rientjes <[email protected]> Acked-by: Pekka Enberg <[email protected]> Signed-off-by: James Bottomley <[email protected]> --- init/Kconfig | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index 56240e7..a7ad8fb 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1226,6 +1226,7 @@ config SLAB per cpu and per node queues. config SLUB + depends on BROKEN || NUMA || !DISCONTIGMEM bool "SLUB (Unqueued Allocator)" help SLUB is a slab allocator that minimizes cache line usage _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
