Messages in this thread Patch in this message | | | Date | Tue, 14 Sep 2004 12:44:49 +0200 | From | Ingo Molnar <> | Subject | [patch] sched, net: fix scheduling latencies in __release_sock |
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the attached patch fixes long scheduling latencies caused by backlog triggered by __release_sock(). That code only executes in process context, and we've made the backlog queue private already at this point so it is safe to do a cond_resched_softirq().
This patch has been in the -VP patchset for some time.
Ingo
the attached patch fixes long scheduling latencies caused by backlog triggered by __release_sock(). That code only executes in process context, and we've made the backlog queue private already at this point so it is safe to do a cond_resched_softirq().
This patch has been in the -VP patchset for some time.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
--- linux/net/core/sock.c.orig +++ linux/net/core/sock.c @@ -933,6 +933,15 @@ void __release_sock(struct sock *sk) skb->next = NULL; sk->sk_backlog_rcv(sk, skb); + + /* + * We are in process context here with softirqs + * disabled, use cond_resched_softirq() to preempt. + * This is safe to do because we've taken the backlog + * queue private: + */ + cond_resched_softirq(); + skb = next; } while (skb != NULL);
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