This is a note to let you know that I've just added the patch titled
[PARISC] slub: fix panic with DISCONTIGMEM
to the 2.6.33-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.33.git;a=summary
The filename of the patch is:
slub-fix-panic-with-discontigmem.patch
and it can be found in the queue-2.6.33 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.33 longterm
tree,
please let <[email protected]> know about it.
>From 4a5fa3590f09999f6db41bc386bce40848fa9f63 Mon Sep 17 00:00:00 2001
From: James Bottomley <[email protected]>
Date: Tue, 19 Apr 2011 16:29:36 -0500
Subject: [PARISC] slub: fix panic with DISCONTIGMEM
From: James Bottomley <[email protected]>
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 protected]>
Acked-by: Pekka Enberg <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
init/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1070,6 +1070,7 @@ 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
Patches currently in longterm-queue-2.6.33 which might be from
[email protected] are
/home/gregkh/linux/longterm/longterm-queue-2.6.33/queue-2.6.33/slub-fix-panic-with-discontigmem.patch
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