From: Yong Zhang <yong.zhang0@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Venki Pallipadi <venki@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Aaron Durbin <adurbin@google.com>, Paul Turner <pjt@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC] Extend mwait idle to optimize away IPIs when possible
Date: Wed, 15 Feb 2012 09:39:58 +0800 [thread overview]
Message-ID: <20120215013958.GA24229@zhy> (raw)
In-Reply-To: <1329227537.2293.1.camel@twins>
On Tue, Feb 14, 2012 at 02:52:17PM +0100, Peter Zijlstra wrote:
> On Mon, 2012-02-13 at 13:34 +0800, Yong Zhang wrote:
> > Yeah, most of the things could be shared. Such as the added logic when
> > return from idle and the hooks into ttwu_queue_remote() and
> > generic_exec_single().
> >
>
> The thing is, those last two should not have hooks.
Yeah, it's general place; and smp_need_ipi() plays well.
> Nor am I convinced
> anything outside of the arch idle loop should have any.
'idle loop' is the key point :)
Thanks,
Yong
next prev parent reply other threads:[~2012-02-15 2:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-06 20:42 [RFC] Extend mwait idle to optimize away IPIs when possible Venkatesh Pallipadi
2012-02-06 21:02 ` Peter Zijlstra
2012-02-06 21:26 ` Venki Pallipadi
2012-02-07 0:26 ` David Daney
2012-02-07 1:24 ` H. Peter Anvin
2012-02-07 1:34 ` David Daney
2012-02-07 1:45 ` H. Peter Anvin
2012-02-07 2:03 ` Venki Pallipadi
2012-02-07 2:24 ` Suresh Siddha
2012-02-07 21:39 ` Venki Pallipadi
2012-02-08 6:51 ` Yong Zhang
2012-02-08 23:28 ` Venki Pallipadi
2012-02-09 2:18 ` Yong Zhang
2012-02-10 2:17 ` Venki Pallipadi
2012-02-13 5:27 ` Yong Zhang
2012-02-10 19:19 ` Peter Zijlstra
2012-02-11 2:11 ` Venki Pallipadi
2012-02-11 3:09 ` Peter Zijlstra
2012-02-13 5:34 ` Yong Zhang
2012-02-14 13:52 ` Peter Zijlstra
2012-02-15 1:39 ` Yong Zhang [this message]
2012-02-15 2:32 ` Venki Pallipadi
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