On Tue, Nov 12, 2013 at 02:53:16PM +0100, Geert Uytterhoeven wrote:
> net/netfilter/ipvs/ip_vs_sync.c: In function 'sync_thread_master':
> net/netfilter/ipvs/ip_vs_sync.c:1640:8: warning: unused variable 'ret'
> [-Wunused-variable]
>
> Introduced by commit 35a2af94c7ce7130ca292c68b1d27fcfdb648f6b ("sched/wait:
> Make the __wait_event*() interface more friendly")
>
> Signed-off-by: Geert Uytterhoeven <ge...@linux-m68k.org>
> ---
> net/netfilter/ipvs/ip_vs_sync.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
> index f63c2388f38d..d258125c4202 100644
> --- a/net/netfilter/ipvs/ip_vs_sync.c
> +++ b/net/netfilter/ipvs/ip_vs_sync.c
> @@ -1637,7 +1637,7 @@ static int sync_thread_master(void *data)
> continue;
> }
> while (ip_vs_send_sync_msg(tinfo->sock, sb->mesg) < 0) {
> - int ret = __wait_event_interruptible(*sk_sleep(sk),
So ideally there's be a comment here why we're using interruptible but
then ignore interruptions.
Julian said (
http://lkml.kernel.org/r/alpine.lfd.2.00.1310012245020.1...@ja.ssi.bg ):
" Yes, your patch looks ok to me. In the past
we used ssleep() but IPVS users were confused why
IPVS threads increase the load average. So, we
switched to _interruptible calls and later the socket
polling was added. "
So maybe add something like
/*
* (Ab)use interruptible sleep to avoid increasing
* the load avg.
*/
> + __wait_event_interruptible(*sk_sleep(sk),
> sock_writeable(sk) ||
> kthread_should_stop());
> if (unlikely(kthread_should_stop()))
> --
> 1.7.9.5
>
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