From: Peter Zijlstra <peterz@infradead.org>
To: "Liu, Chuansheng" <chuansheng.liu@intel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
"luto@amacapital.net" <luto@amacapital.net>,
"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
"mingo@redhat.com" <mingo@redhat.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Liu, Changcheng" <changcheng.liu@intel.com>,
"Wang, Xiaoming" <xiaoming.wang@intel.com>,
"Chakravarty, Souvik K" <souvik.k.chakravarty@intel.com>
Subject: Re: [PATCH 3/3] cpuidle: Using the wake_up_all_idle_cpus() to wake up all idle cpus
Date: Thu, 4 Sep 2014 17:47:10 +0200 [thread overview]
Message-ID: <20140904154710.GH346@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <27240C0AC20F114CBF8149A2696CBE4A01E6B3E3@SHSMSX101.ccr.corp.intel.com>
On Thu, Sep 04, 2014 at 01:39:38PM +0000, Liu, Chuansheng wrote:
> > So IIUC, kick_all_cpus_sync is a broken function, right ?
> kick_all_cpus_sync has other callers, and those other callers want the
> old behavior. I think this should be a new function.
Correct, things like arch/powerpc/mm/pgtable_64.c:pmdp_clear_flush()
really want the old behaviour. It basically uses
local_irq_disable()/local_irq_enable() vs kick_all_cpus_sync() as a RCU
like serialization primitive.
next prev parent reply other threads:[~2014-09-04 15:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-04 7:17 [PATCH 1/3] sched: Add new API wake_up_if_idle() to wake up the idle cpu Chuansheng Liu
2014-09-04 7:17 ` [PATCH 2/3] smp: Adding new function wake_up_all_idle_cpus() Chuansheng Liu
2014-09-04 12:56 ` Daniel Lezcano
2014-09-19 11:44 ` [tip:sched/core] smp: Add new wake_up_all_idle_cpus() function tip-bot for Chuansheng Liu
2014-09-04 7:17 ` [PATCH 3/3] cpuidle: Using the wake_up_all_idle_cpus() to wake up all idle cpus Chuansheng Liu
2014-09-04 13:01 ` Daniel Lezcano
2014-09-04 13:39 ` Liu, Chuansheng
2014-09-04 13:39 ` Liu, Chuansheng
2014-09-04 15:47 ` Peter Zijlstra [this message]
2014-09-19 11:44 ` [tip:sched/core] cpuidle: Use " tip-bot for Chuansheng Liu
2014-09-04 12:53 ` [PATCH 1/3] sched: Add new API wake_up_if_idle() to wake up the idle cpu Daniel Lezcano
2014-09-04 12:59 ` Liu, Chuansheng
2014-09-04 12:59 ` Liu, Chuansheng
2014-09-19 11:43 ` [tip:sched/core] " tip-bot for Chuansheng Liu
2014-12-19 20:23 ` Andy Lutomirski
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