linux-kernel - [PATCH RESEND 0/1] sched/rt: minimize rq->lock contention in, do_sched_rt_period

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Message-ID: <741689b4-2e37-bdfe-5953-bb954fe5c35a@oracle.com>
Date:   Mon, 15 May 2017 14:13:09 -0500
From:   Dave Kleikamp <dave.kleikamp@...cle.com>
To:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>
Subject: [PATCH RESEND 0/1] sched/rt: minimize rq->lock contention in,
 do_sched_rt_period_timer()

Peter, Ingo,

I sent this patch about a month ago and got no response.

https://patchwork.kernel.org/patch/9684545/

Does it seem reasonable? I'm not sure if taking rt_runtime_lock is
strictly necessary, but it's a big improvement to taking rq->lock every
pass through the loop. Is there another way to fix this?

Thanks,
Shaggy