Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a0e1d1be204612ee83b3afe8aa24c5d27e63d464
Commit: a0e1d1be204612ee83b3afe8aa24c5d27e63d464
Parent: 434e245ddd3f14aa8eef97cae16c71b863ab092a
Author: Christoph Lameter <[EMAIL PROTECTED]>
AuthorDate: Tue Jul 17 04:03:31 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Jul 17 10:23:02 2007 -0700
SLUB: Move sysfs operations outside of slub_lock
Sysfs can do a gazillion things when called. Make sure that we do not call
any sysfs functions while holding the slub_lock.
Just protect the essentials:
1. The list of all slab caches
2. The kmalloc_dma array
3. The ref counters of the slabs.
Signed-off-by: Christoph Lameter <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
mm/slub.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index f976d28..1c5d6a0 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2192,12 +2192,13 @@ void kmem_cache_destroy(struct kmem_cache *s)
s->refcount--;
if (!s->refcount) {
list_del(&s->list);
+ up_write(&slub_lock);
if (kmem_cache_close(s))
WARN_ON(1);
sysfs_slab_remove(s);
kfree(s);
- }
- up_write(&slub_lock);
+ } else
+ up_write(&slub_lock);
}
EXPORT_SYMBOL(kmem_cache_destroy);
@@ -2679,25 +2680,26 @@ struct kmem_cache *kmem_cache_create(const char *name,
size_t size,
*/
s->objsize = max(s->objsize, (int)size);
s->inuse = max_t(int, s->inuse, ALIGN(size, sizeof(void *)));
+ up_write(&slub_lock);
if (sysfs_slab_alias(s, name))
goto err;
- } else {
- s = kmalloc(kmem_size, GFP_KERNEL);
- if (s && kmem_cache_open(s, GFP_KERNEL, name,
+ return s;
+ }
+ s = kmalloc(kmem_size, GFP_KERNEL);
+ if (s) {
+ if (kmem_cache_open(s, GFP_KERNEL, name,
size, align, flags, ctor)) {
- if (sysfs_slab_add(s)) {
- kfree(s);
- goto err;
- }
list_add(&s->list, &slab_caches);
- } else
- kfree(s);
+ up_write(&slub_lock);
+ if (sysfs_slab_add(s))
+ goto err;
+ return s;
+ }
+ kfree(s);
}
up_write(&slub_lock);
- return s;
err:
- up_write(&slub_lock);
if (flags & SLAB_PANIC)
panic("Cannot create slabcache %s\n", name);
else
-
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