1 files changed, 14 insertions, 21 deletions

diff --git a/mm/mempool.c b/mm/mempool.c
index b014ffeaa413..c9f3d4620428 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -198,31 +198,22 @@ void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask)
         void *element;
         unsigned long flags;
         DEFINE_WAIT(wait);
-        int gfp_nowait = gfp_mask & ~(__GFP_WAIT | __GFP_IO);
+        int gfp_temp;
 
         might_sleep_if(gfp_mask & __GFP_WAIT);
+
+        gfp_mask |= __GFP_NOMEMALLOC;   /* don't allocate emergency reserves */
+        gfp_mask |= __GFP_NORETRY;      /* don't loop in __alloc_pages */
+        gfp_mask |= __GFP_NOWARN;       /* failures are OK */
+
+        gfp_temp = gfp_mask & ~(__GFP_WAIT|__GFP_IO);
+
 repeat_alloc:
-        element = pool->alloc(gfp_nowait|__GFP_NOWARN, pool->pool_data);
+
+        element = pool->alloc(gfp_temp, pool->pool_data);
         if (likely(element != NULL))
                 return element;
 
-        /*
-         * If the pool is less than 50% full and we can perform effective
-         * page reclaim then try harder to allocate an element.
-         */
-        mb();
-        if ((gfp_mask & __GFP_FS) && (gfp_mask != gfp_nowait) &&
-                                (pool->curr_nr <= pool->min_nr/2)) {
-                element = pool->alloc(gfp_mask, pool->pool_data);
-                if (likely(element != NULL))
-                        return element;
-        }
-
-        /*
-         * Kick the VM at this point.
-         */
-        wakeup_bdflush(0);
-
         spin_lock_irqsave(&pool->lock, flags);
         if (likely(pool->curr_nr)) {
                 element = remove_element(pool);
@@ -235,8 +226,10 @@ repeat_alloc:
         if (!(gfp_mask & __GFP_WAIT))
                 return NULL;
 
+        /* Now start performing page reclaim */
+        gfp_temp = gfp_mask;
         prepare_to_wait(&pool->wait, &wait, TASK_UNINTERRUPTIBLE);
-        mb();
+        smp_mb();
         if (!pool->curr_nr)
                 io_schedule();
         finish_wait(&pool->wait, &wait);
@@ -257,7 +250,7 @@ void mempool_free(void *element, mempool_t *pool)
 {
         unsigned long flags;
 
-        mb();
+        smp_mb();
         if (pool->curr_nr < pool->min_nr) {
                 spin_lock_irqsave(&pool->lock, flags);
                 if (pool->curr_nr < pool->min_nr) {