Message-ID: <1381120901.9926.11.camel@marge.simpson.net>
Subject: Re: [PATCH V3]hrtimer: Fix a performance regression by disable
 reprogramming in remove_hrtimer
From: Mike Galbraith <bitbucket@online.de>
To: Ethan Zhao <ethan.kernel@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>, rjw@sisk.pl,
        daniel.lezcano@linaro.org, linux-pm@vger.kernel.org, lenb@kernel.org
Date: Mon, 07 Oct 2013 06:41:41 +0200
In-Reply-To: <CABawtvMo+NtTv3a3jj=YTg-Om=MzHhVDARdtTA-DtTMzNeNAJA@mail.gmail.com>
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On Fri, 2013-10-04 at 20:06 +0800, Ethan Zhao wrote: 
> Mike, Peter,
>    Seems lots of work has been done these days, studious guys. those
> patches merged in last stable/dev branch (fix performance regression
> caused by extra rtimer programming and rescheduling IPI,confusing
> idle... etc) ? So I could just do a lazy pull for test with my
> environment.  I need catch up with other mail loops with my vacation
> again.

Massive timer overhead seems to have crawled off and died while I wasn't
looking.  Peter's fix for IPI woes..

tip commit ea811747 sched, idle: Fix the idle polling state logic

..hasn't yet swum upstream.

-Mike

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