diff options
Diffstat (limited to 'net/ipv4/tcp_metrics.c')
| -rw-r--r-- | net/ipv4/tcp_metrics.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index 7aca12c59c..c2a9255385 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -898,11 +898,13 @@ static void tcp_metrics_flush_all(struct net *net) unsigned int row; for (row = 0; row < max_rows; row++, hb++) { - struct tcp_metrics_block __rcu **pp; + struct tcp_metrics_block __rcu **pp = &hb->chain; bool match; + if (!rcu_access_pointer(*pp)) + continue; + spin_lock_bh(&tcp_metrics_lock); - pp = &hb->chain; for (tm = deref_locked(*pp); tm; tm = deref_locked(*pp)) { match = net ? net_eq(tm_net(tm), net) : !refcount_read(&tm_net(tm)->ns.count); @@ -914,6 +916,7 @@ static void tcp_metrics_flush_all(struct net *net) } } spin_unlock_bh(&tcp_metrics_lock); + cond_resched(); } } |