lkml.org 
[lkml]   [2006]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: kernel BUG in __cache_alloc_node at linux-2.6.git/mm/slab.c:3177!
On Fri, 13 Oct 2006, Will Schmidt wrote:

> Am seeing a crash on a power5 LPAR when booting the linux-2.6 git
> tree. It's fairly early during boot, so I've included the whole log
> below. This partition has 8 procs, (shared, including threads), and
> 512M RAM.

This looks like slab bootstrap. You are bootstrapping while having
zonelists build with zones that are only going to be populated later?
This will lead to incorrect NUMA placement of lots of slab structures on
bootup.

Check if the patch below may cure the oops. Your memory is likely
still placed on the wrong numa nodes since we have to fallback from
the intended node.

Index: linux-2.6/mm/slab.c
===================================================================
--- linux-2.6.orig/mm/slab.c 2006-10-13 11:59:55.000000000 -0700
+++ linux-2.6/mm/slab.c 2006-10-13 12:03:15.000000000 -0700
@@ -3154,7 +3154,8 @@ void *fallback_alloc(struct kmem_cache *

for (z = zonelist->zones; *z && !obj; z++)
if (zone_idx(*z) <= ZONE_NORMAL &&
- cpuset_zone_allowed(*z, flags))
+ cpuset_zone_allowed(*z, flags) &&
+ (*z)->free_pages)
obj = __cache_alloc_node(cache,
flags | __GFP_THISNODE,
zone_to_nid(*z));
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-10-13 21:07    [W:3.027 / U:0.496 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site