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slub: Check kasprintf results in kmem_cache_init() 

Small allocations may fail during slab bringup which is fatal. Add a BUG_ON()
so that we fail immediately rather than failing later during sysfs
processing.

Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Christoph Lameter 2010-07-09 14:07:12 -05:00 committed by Pekka Enberg
parent f90ec39014
commit d7278bd7d1
1 changed files with 6 additions and 3 deletions
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9
mm/slub.c
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@ -3118,9 +3118,12 @@ void __init kmem_cache_init(void)
slab_state = UP;
/* Provide the correct kmalloc names now that the caches are up */
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++)
kmalloc_caches[i]. name =
kasprintf(GFP_NOWAIT, "kmalloc-%d", 1 << i);
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++) {
char *s = kasprintf(GFP_NOWAIT, "kmalloc-%d", 1 << i);
BUG_ON(!s);
kmalloc_caches[i].name = s;
}
#ifdef CONFIG_SMP
register_cpu_notifier(&slab_notifier);