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netfilter: conntrack: use power efficient workqueue

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conntrack uses the bounded system_long_wq workqueue for its works that
don't have to run on the cpu they have been queued.
Using bounded workqueue prevents the scheduler to make smart decision about
the best place to schedule the work.

This patch replaces system_long_wq with system_power_efficient_wq. the work
stays bounded to a cpu by default unless the CONFIG_WQ_POWER_EFFICIENT is
enable. In the latter case, the work can be scheduled on the best cpu from
a power or a performance point of view.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Vincent Guittot 2017-11-02 16:16:07 +01:00 committed by Pablo Neira Ayuso
parent 7e35ec0e80
commit 0984d427c1
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nf_conntrack_core.c
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@ -1083,7 +1083,7 @@ static void gc_worker(struct work_struct *work)
next_run = gc_work->next_gc_run;
gc_work->last_bucket = i;
gc_work->early_drop = false;
queue_delayed_work(system_long_wq, &gc_work->dwork, next_run);
queue_delayed_work(system_power_efficient_wq, &gc_work->dwork, next_run);
}
static void conntrack_gc_work_init(struct conntrack_gc_work *gc_work)
@ -2089,7 +2089,7 @@ int nf_conntrack_init_start(void)
goto err_proto;
conntrack_gc_work_init(&conntrack_gc_work);
queue_delayed_work(system_long_wq, &conntrack_gc_work.dwork, HZ);
queue_delayed_work(system_power_efficient_wq, &conntrack_gc_work.dwork, HZ);
return 0;