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-rw-r--r--mm/mempool.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/mm/mempool.c b/mm/mempool.c
index e3a802a..d904981 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -221,14 +221,23 @@ repeat_alloc:
return element;
}
- /* We must not sleep in the GFP_ATOMIC case */
+ /*
+ * We use gfp mask w/o __GFP_WAIT or IO for the first round. If
+ * alloc failed with that and @pool was empty, retry immediately.
+ */
+ if (gfp_temp != gfp_mask) {
+ spin_unlock_irqrestore(&pool->lock, flags);
+ gfp_temp = gfp_mask;
+ goto repeat_alloc;
+ }
+
+ /* We must not sleep if !__GFP_WAIT */
if (!(gfp_mask & __GFP_WAIT)) {
spin_unlock_irqrestore(&pool->lock, flags);
return NULL;
}
/* Let's wait for someone else to return an element to @pool */
- gfp_temp = gfp_mask;
init_wait(&wait);
prepare_to_wait(&pool->wait, &wait, TASK_UNINTERRUPTIBLE);
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