diff options
| author |   tom.leiming@gmail.com <tom.leiming@gmail.com> | 2015-12-29 22:40:26 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-12-29 15:13:44 -0500 |
| commit | 45d8390c56bd2851097736c1c20ad958880168df (patch) | |
| tree | 230b546c8010d793e879618ffc656e12a07fd40a /kernel | |
| parent | bpf: hash: use atomic count (diff) | |
| download | linux-dev-45d8390c56bd2851097736c1c20ad958880168df.tar.xz linux-dev-45d8390c56bd2851097736c1c20ad958880168df.zip | |
bpf: hash: move select_bucket() out of htab's spinlock
The spinlock is just used for protecting the per-bucket
hlist, so it isn't needed for selecting bucket.
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/hashtab.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index 2615388009a4..d857fcb3607b 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -248,12 +248,11 @@ static int htab_map_update_elem(struct bpf_map *map, void *key, void *value, memcpy(l_new->key + round_up(key_size, 8), value, map->value_size); l_new->hash = htab_map_hash(l_new->key, key_size); + head = select_bucket(htab, l_new->hash); /* bpf_map_update_elem() can be called in_irq() */ raw_spin_lock_irqsave(&htab->lock, flags); - head = select_bucket(htab, l_new->hash); - l_old = lookup_elem_raw(head, l_new->hash, key, key_size); if (!l_old && unlikely(atomic_read(&htab->count) >= map->max_entries)) { @@ -310,11 +309,10 @@ static int htab_map_delete_elem(struct bpf_map *map, void *key) key_size = map->key_size; hash = htab_map_hash(key, key_size); + head = select_bucket(htab, hash); raw_spin_lock_irqsave(&htab->lock, flags); - head = select_bucket(htab, hash); - l = lookup_elem_raw(head, hash, key, key_size); if (l) { |