From: Luiz Capitulino <lcapitulino@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org, Rik van Riel <riel@redhat.com>
Subject: Re: kernel/timer: avoid spurious ksoftirqd wakeups (v2)
Date: Mon, 13 Apr 2015 11:06:40 -0400 [thread overview]
Message-ID: <20150413110640.40f137c4@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1504111124020.3845@nanos>
On Sat, 11 Apr 2015 11:25:49 +0200 (CEST)
Thomas Gleixner <tglx@linutronix.de> wrote:
> On Fri, 10 Apr 2015, Luiz Capitulino wrote:
> > On Fri, 10 Apr 2015 15:09:07 -0300
> > > It seems a valid solution for this interrupt is to program
> > > sched_timer to the nearest future possible.
> >
> > What about calling the timer function right there, like
> > hrtimer_interrupt() does?
>
> No, you cannot call the timer function from the enqueue path. The
> caller might hold a lock which is taken in the callback as well.....
Fair enough. We're going to think about a different solution.
>
> Thanks,
>
> tglx
>
prev parent reply other threads:[~2015-04-13 15:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-06 23:15 kernel/timer: avoid spurious ksoftirqd wakeups (v2) Marcelo Tosatti
2015-04-06 23:20 ` Rik van Riel
2015-04-07 21:10 ` Thomas Gleixner
2015-04-07 22:12 ` Frederic Weisbecker
2015-04-10 18:09 ` Marcelo Tosatti
2015-04-11 1:30 ` Luiz Capitulino
2015-04-11 9:25 ` Thomas Gleixner
2015-04-13 15:06 ` Luiz Capitulino [this message]
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