Re: [PATCH RFC] sched: introduce add_wait_queue_exclusive_head

[Dilger, Andreas]

On 2014/03/19, 1:55 PM, "Peter Zijlstra" <peterz@xxxxxxxxxxxxx> wrote:

>On Wed, Mar 19, 2014 at 07:44:29PM +0000, Dilger, Andreas wrote:
>> The original reason for l_wait_event() not using TASK_UNINTERRUPTIBLE
>> is to avoid the load on the server continually being
>>"num_service_threads"
>> regardless of whether they are actually doing something or not.  We
>> added various cases for periodic wakeups and such afterward.
>
>Hmm, maybe we should finally do the TASK_IDLE thing;
>
>  https://lkml.org/lkml/2013/11/12/710

That looks pretty interesting, and appears to do what we need.

Cheers, Andreas
-- 
Andreas Dilger

Lustre Software Architect
Intel High Performance Data Division


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