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authorEric Dumazet <edumazet@google.com>2014-10-04 21:11:31 +0400
committerDavid S. Miller <davem@davemloft.net>2014-10-06 08:55:10 +0400
commitf2600cf02b5b59aaee082c3485b7f01fc7f7b70c (patch)
treef38d692c3f706ead3d0cfd77b216fbd629a22964 /include/net/pkt_sched.h
parent681d2421e1135b95f5cd9d16fe10eac7f570a9f2 (diff)
downloadlinux-f2600cf02b5b59aaee082c3485b7f01fc7f7b70c.tar.xz
net: sched: avoid costly atomic operation in fq_dequeue()
Standard qdisc API to setup a timer implies an atomic operation on every packet dequeue : qdisc_unthrottled() It turns out this is not really needed for FQ, as FQ has no concept of global qdisc throttling, being a qdisc handling many different flows, some of them can be throttled, while others are not. Fix is straightforward : add a 'bool throttle' to qdisc_watchdog_schedule_ns(), and remove calls to qdisc_unthrottled() in sch_fq. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/pkt_sched.h')
-rw-r--r--include/net/pkt_sched.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index e4b3c828c1c2..27a33833ff4a 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -65,12 +65,12 @@ struct qdisc_watchdog {
};
void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc);
-void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires);
+void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires, bool throttle);
static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd,
psched_time_t expires)
{
- qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires));
+ qdisc_watchdog_schedule_ns(wd, PSCHED_TICKS2NS(expires), true);
}
void qdisc_watchdog_cancel(struct qdisc_watchdog *wd);