perf/x86/intel: Remove an inconsistent NULL check

[cascardo/linux.git] / mm / ksm.c

diff --git a/mm/ksm.c b/mm/ksm.c
index 73d43ba..9ae6011 100644 (file)
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -283,7 +283,8 @@ static inline struct rmap_item *alloc_rmap_item(void)
 {
        struct rmap_item *rmap_item;
 
-       rmap_item = kmem_cache_zalloc(rmap_item_cache, GFP_KERNEL);
+       rmap_item = kmem_cache_zalloc(rmap_item_cache, GFP_KERNEL |
+                                               __GFP_NORETRY | __GFP_NOWARN);
        if (rmap_item)
                ksm_rmap_items++;
        return rmap_item;
@@ -298,7 +299,12 @@ static inline void free_rmap_item(struct rmap_item *rmap_item)
 
 static inline struct stable_node *alloc_stable_node(void)
 {
-       return kmem_cache_alloc(stable_node_cache, GFP_KERNEL);
+       /*
+        * The allocation can take too long with GFP_KERNEL when memory is under
+        * pressure, which may lead to hung task warnings.  Adding __GFP_HIGH
+        * grants access to memory reserves, helping to avoid this problem.
+        */
+       return kmem_cache_alloc(stable_node_cache, GFP_KERNEL | __GFP_HIGH);
 }
 
 static inline void free_stable_node(struct stable_node *stable_node)