rhashtable: avoid large lock-array allocations

[cascardo/linux.git] / lib / rhashtable.c

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 5d845ff..42acd81 100644 (file)
--- 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)