1 files changed, 9 insertions, 4 deletions

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 5d845ffd7982..5ba520b544d7 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -30,7 +30,7 @@
 
 #define HASH_DEFAULT_SIZE       64UL
 #define HASH_MIN_SIZE           4U
-#define BUCKET_LOCKS_PER_CPU   128UL
+#define BUCKET_LOCKS_PER_CPU    32UL
 
 static u32 head_hashfn(struct rhashtable *ht,
                        const struct bucket_table *tbl,
@@ -70,7 +70,7 @@ static int alloc_bucket_locks(struct rhashtable *ht, struct bucket_table *tbl,
         unsigned int nr_pcpus = num_possible_cpus();
 #endif
 
-        nr_pcpus = min_t(unsigned int, nr_pcpus, 32UL);
+        nr_pcpus = min_t(unsigned int, nr_pcpus, 64UL);
         size = roundup_pow_of_two(nr_pcpus * ht->p.locks_mul);
 
         /* Never allocate more than 0.5 locks per bucket */
@@ -83,6 +83,9 @@ static int alloc_bucket_locks(struct rhashtable *ht, struct bucket_table *tbl,
                         tbl->locks = vmalloc(size * sizeof(spinlock_t));
                 else
 #endif
+                if (gfp != GFP_KERNEL)
+                        gfp |= __GFP_NOWARN | __GFP_NORETRY;
+
                 tbl->locks = kmalloc_array(size, sizeof(spinlock_t),
                                            gfp);
                 if (!tbl->locks)
@@ -321,12 +324,14 @@ static int rhashtable_expand(struct rhashtable *ht)
 static int rhashtable_shrink(struct rhashtable *ht)
 {
         struct bucket_table *new_tbl, *old_tbl = rht_dereference(ht->tbl, ht);
-        unsigned int size;
+        unsigned int nelems = atomic_read(&ht->nelems);
+        unsigned int size = 0;
         int err;
 
         ASSERT_RHT_MUTEX(ht);
 
-        size = roundup_pow_of_two(atomic_read(&ht->nelems) * 3 / 2);
+        if (nelems)
+                size = roundup_pow_of_two(nelems * 3 / 2);
         if (size < ht->p.min_size)
                 size = ht->p.min_size;