The patch titled
mm: fallback_alloc cpuset_zone_allowed irq fix
has been added to the -mm tree. Its filename is
mm-fallback_alloc-cpuset_zone_allowed-irq-fix.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: fallback_alloc cpuset_zone_allowed irq fix
From: Paul Jackson <pj@xxxxxxx>
fallback_alloc() could end up calling cpuset_zone_allowed() with interrupts
disabled (by code in kmem_cache_alloc_node()), but without __GFP_HARDWALL
set, leading to a possible call of a sleeping function with interrupts
disabled.
This results in the BUG report:
BUG: sleeping function called from invalid context at kernel/cpuset.c:1520
in_atomic():0, irqs_disabled():1
Thanks to Paul Menage for catching this one.
Signed-off-by: Paul Jackson <pj@xxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/slab.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/slab.c~mm-fallback_alloc-cpuset_zone_allowed-irq-fix mm/slab.c
--- a/mm/slab.c~mm-fallback_alloc-cpuset_zone_allowed-irq-fix
+++ a/mm/slab.c
@@ -3182,7 +3182,7 @@ retry:
for (z = zonelist->zones; *z && !obj; z++) {
nid = zone_to_nid(*z);
- if (cpuset_zone_allowed(*z, flags) &&
+ if (cpuset_zone_allowed(*z, flags | __GFP_HARDWALL) &&
cache->nodelists[nid] &&
cache->nodelists[nid]->free_objects)
obj = ____cache_alloc_node(cache,
_
Patches currently in -mm which might be from pj@xxxxxxx are
memory-page-alloc-minor-cleanups.patch
memory-page_alloc-zonelist-caching-speedup.patch
memory-page_alloc-zonelist-caching-reorder-structure.patch
cpuset-minor-code-refinements.patch
cpuset-allow-a-larger-buffer-for-writes-to-cpuset-files.patch
mm-fallback_alloc-cpuset_zone_allowed-irq-fix.patch
cpuset-remove-sched-domain-hooks-from-cpusets.patch
-
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