diff options
| author | Christoph Lameter <clameter@sgi.com> | 2007-06-01 00:47:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-01 08:18:30 -0700 |
| commit | 27390bc335ff86d92c3819cc28035fde23d1a9c2 (patch) | |
| tree | 2812436fe897a1211c244f85db2a4d79fff673ff | |
| parent | ac140a8f8396504b33ddafb7309feca77bff8497 (diff) | |
SLUB: fix locking for hotplug callbacks
Hotplug callbacks are performed with interrupts enabled. Slub requires
interrupts to be disabled for flushing caches.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slub.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/mm/slub.c b/mm/slub.c index 238c5a6ee89..51663a3c3c2 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2608,6 +2608,19 @@ static void for_all_slabs(void (*func)(struct kmem_cache *, int), int cpu) } /* + * Version of __flush_cpu_slab for the case that interrupts + * are enabled. + */ +static void cpu_slab_flush(struct kmem_cache *s, int cpu) +{ + unsigned long flags; + + local_irq_save(flags); + __flush_cpu_slab(s, cpu); + local_irq_restore(flags); +} + +/* * Use the cpu notifier to insure that the cpu slabs are flushed when * necessary. */ @@ -2621,7 +2634,7 @@ static int __cpuinit slab_cpuup_callback(struct notifier_block *nfb, case CPU_UP_CANCELED_FROZEN: case CPU_DEAD: case CPU_DEAD_FROZEN: - for_all_slabs(__flush_cpu_slab, cpu); + for_all_slabs(cpu_slab_flush, cpu); break; default: break; |