Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=27390bc335ff86d92c3819cc28035fde23d1a9c2
Commit: 27390bc335ff86d92c3819cc28035fde23d1a9c2
Parent: ac140a8f8396504b33ddafb7309feca77bff8497
Author: Christoph Lameter <[EMAIL PROTECTED]>
AuthorDate: Fri Jun 1 00:47:09 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Jun 1 08:18:30 2007 -0700
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 <[EMAIL PROTECTED]>
Cc: Michal Piotrowski <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
mm/slub.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 238c5a6..51663a3 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;
-
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