Re: [RFC 7/7] net: don't check for active hrtimer after adding it

From: Viresh Kumar
Date: Wed Jul 09 2014 - 11:23:57 EST

On 9 July 2014 16:14, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
> Yeah, it looks like we can get rid of this. Also,
> } while (t.task && pkt_dev->running && !signal_pending(current));
> is present in the closing "}" of do-while loop and probably we
> don't need to check t.task here as well.

Actually No. t.task is modified from hrtimer handler and so this check
would stay:

Diff I have added to this patch:

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index f911acd..cc2694e 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2187,8 +2187,7 @@ static void spin(struct pktgen_dev *pkt_dev,
ktime_t spin_until)
hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);

- if (likely(t.task))
- schedule();
+ schedule();

} while (t.task && pkt_dev->running &&
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