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slub page alloc fallback: Enable interrupts for GFP_WAIT.

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The fallback path needs to enable interrupts like done for
the other page allocator calls. This was not necessary with
the alternate fast path since we handled irq enable/disable in
the slow path. The regular fastpath handles irq enable/disable
around calls to the slow path so we need to restore the proper
status before calling the page allocator from the slowpath.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
This commit is contained in:
Christoph Lameter 2008-03-12 23:57:49 -07:00
parent bde4f8fa8d
commit caeab084de
1 changed files with 9 additions and 3 deletions
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12
mm/slub.c
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@ -1536,9 +1536,15 @@ static void *__slab_alloc(struct kmem_cache *s,
* That is only possible if certain conditions are met that are being
* checked when a slab is created.
*/
if (!(gfpflags & __GFP_NORETRY) && (s->flags & __PAGE_ALLOC_FALLBACK))
return kmalloc_large(s->objsize, gfpflags);
if (!(gfpflags & __GFP_NORETRY) &&
(s->flags & __PAGE_ALLOC_FALLBACK)) {
if (gfpflags & __GFP_WAIT)
local_irq_enable();
object = kmalloc_large(s->objsize, gfpflags);
if (gfpflags & __GFP_WAIT)
local_irq_disable();
return object;
}
return NULL;
debug:
if (!alloc_debug_processing(s, c->page, object, addr))