linux-kernel - Re: [PATCH] sched: Optimize pick_next_task for idle_sched

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Message-ID: <20170301162218.GQ6515@twins.programming.kicks-ass.net>
Date:   Wed, 1 Mar 2017 17:22:18 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Pavan Kondeti <pkondeti@...eaurora.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sched: Optimize pick_next_task for idle_sched_class too

On Wed, Mar 01, 2017 at 11:19:22AM -0500, Steven Rostedt wrote:
> On Wed, 1 Mar 2017 17:03:52 +0100
> Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > On Wed, Mar 01, 2017 at 10:53:03AM -0500, Steven Rostedt wrote:
> > > Peter, do we have a solution for this yet? Are you going to add the one
> > > with the linker magic?  
> > 
> > I queued the below earlier today.
> 
> Isn't this pretty much identical to the patch I sent you a month ago?
> 
>   http://lkml.kernel.org/r/20170119101703.2abeaeb6@gandalf.local.home

Yes, except this one has a comment explaining why we care about
prev->sched_class.