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authorChristoph Lameter <clameter@sgi.com>2008-03-12 23:57:49 -0700
committerChristoph Lameter <clameter@sgi.com>2008-03-17 11:14:17 -0700
commitcaeab084deb61cd2d51cb8facc0e894a5b406aa4 (patch)
tree9a5bebe51b0dce51169bf86c6a0fb91d0c929c56 /mm
parentbde4f8fa8db2abd5ac9c542d76012d0fedab050f (diff)
downloadop-kernel-dev-caeab084deb61cd2d51cb8facc0e894a5b406aa4.zip
op-kernel-dev-caeab084deb61cd2d51cb8facc0e894a5b406aa4.tar.gz
slub page alloc fallback: Enable interrupts for GFP_WAIT.
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 96d63eb..ca71d5b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1536,9 +1536,15 @@ new_slab:
* 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))
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