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From: Mike Galbraith <efault@gmx.de>
To: Rik van Riel <riel@redhat.com>
Cc: Venkatesh Pallipadi <venki@google.com>,
	mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org,
	a.p.zijlstra@chello.nl, mtosatti@redhat.com, tglx@linutronix.de,
	mingo@elte.hu
Subject: Re: [tip:sched/core] sched: Add yield_to(task, preempt) functionality
Date: Mon, 28 Feb 2011 10:26:29 +0100	[thread overview]
Message-ID: <1298885189.9501.2.camel@marge.simson.net> (raw)
In-Reply-To: <4D689346.1090002@redhat.com>

On Sat, 2011-02-26 at 00:44 -0500, Rik van Riel wrote:
> On 02/25/2011 07:43 PM, Venkatesh Pallipadi wrote:

> > The below comment says about rescheduling p's CPU. But the rq variable
> > we have here is the curr_rq and not p_rq. So, should this be done in
> > yield_to() with p_rq. I did try to see the discussion on other
> > versions of this patch. v3 and before had -
> > "resched_task(task_of(p_cfs_rq->curr));" which seems to be correct...
> 
> You are correct.  We are calling resched_task on the wrong task,
> we should call it on p's runqueue's current task...

Are you going to send a fix?

> >> +
> >> +       /* Make p's CPU reschedule; pick_next_entity takes care of fairness. */
> >> +       if (preempt)
> >> +               resched_task(rq->curr);



  reply	other threads:[~2011-02-28  9:26 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-01 14:44 [PATCH -v8a 0/7] directed yield for Pause Loop Exiting Rik van Riel
2011-02-01 14:47 ` [PATCH -v8a 1/7] sched: check the right ->nr_running in yield_task_fair Rik van Riel
2011-02-03 14:11   ` [tip:sched/core] sched: Check the right ->nr_running in yield_task_fair() tip-bot for Rik van Riel
2011-02-01 14:48 ` [PATCH -v8a 2/7] sched: limit the scope of clear_buddies Rik van Riel
2011-02-03 14:11   ` [tip:sched/core] sched: Limit " tip-bot for Rik van Riel
2011-02-01 14:50 ` [PATCH -v8a 4/7] sched: Add yield_to(task, preempt) functionality Rik van Riel
2011-02-01 15:52   ` Peter Zijlstra
2011-02-03 12:58   ` Peter Zijlstra
2011-02-03 14:12   ` [tip:sched/core] " tip-bot for Mike Galbraith
2011-02-26  0:43     ` Venkatesh Pallipadi
2011-02-26  5:44       ` Rik van Riel
2011-02-28  9:26         ` Mike Galbraith [this message]
2011-03-02  0:28           ` [PATCH] sched: resched proper CPU on yield_to Venkatesh Pallipadi
2011-03-02  3:33             ` Rik van Riel
2011-03-02  3:37               ` Venkatesh Pallipadi
2011-03-02  3:52             ` Rik van Riel
2011-03-04 11:50             ` [tip:sched/core] sched: Resched proper CPU on yield_to() tip-bot for Venkatesh Pallipadi
2011-02-01 14:51 ` [PATCH -v8a 3/7] sched: use a buddy to implement yield_task_fair Rik van Riel
2011-02-01 15:53   ` Peter Zijlstra
2011-02-03 12:58   ` Peter Zijlstra
2011-02-03 14:12   ` [tip:sched/core] sched: Use a buddy to implement yield_task_fair() tip-bot for Rik van Riel
2011-02-01 14:51 ` [PATCH -v8a 5/7] export pid symbols needed for kvm_vcpu_on_spin Rik van Riel
2011-02-01 14:52 ` [PATCH -v8a 6/7] kvm: keep track of which task is running a KVM vcpu Rik van Riel
2011-02-01 14:53 ` [PATCH -v8a 7/7] kvm: use yield_to instead of sleep in kvm_vcpu_on_spin Rik van Riel
2011-02-07  9:08 ` [PATCH -v8a 0/7] directed yield for Pause Loop Exiting Avi Kivity

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