linux-kernel - Re: [PATCH RT 24/32] sched: migrate_enable: Use stop_one_cpu

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Message-ID: <20200122140707.6ac91fc8@gandalf.local.home>
Date:   Wed, 22 Jan 2020 14:07:07 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Scott Wood <swood@...hat.com>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-kernel@...r.kernel.org,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Carsten Emde <C.Emde@...dl.org>,
        John Kacur <jkacur@...hat.com>,
        Julia Cartwright <julia@...com>,
        Daniel Wagner <wagi@...om.org>,
        Tom Zanussi <zanussi@...nel.org>
Subject: Re: [PATCH RT 24/32] sched: migrate_enable: Use
 stop_one_cpu_nowait()

On Wed, 22 Jan 2020 12:39:14 -0600
Scott Wood <swood@...hat.com> wrote:

> On Wed, 2020-01-22 at 06:33 -0500, Steven Rostedt wrote:
> > On Wed, 22 Jan 2020 09:31:30 +0100
> > Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:
> >   
> > > On 2020-01-17 12:41:35 [-0500], Steven Rostedt wrote:  
> > > > 4.19.94-rt39-rc1 stable review patch.
> > > > If anyone has any objections, please let me know.    
> > > 
> > > I don't know how much of this patch and the previous is classified as
> > > "new feature" vs "bug fix". This patch requires patch 31 (of this
> > > series)
> > > as bug fix.
> > > I'm not against it, just pointing out.
> > >   
> > 
> > Hmm, the description looked more of a bug fix than a new feature.  
> 
> Yes, the state clobber was an existing bug.  Patch 23 was a performance
> improvement rather than a bugfix, though.
>

Some people consider performance improvements bug fixes ;-)

-- Steve