linux-kernel - Re: [PATCH v3]sched/rt: Stop for_each_process_thread() iterations in tg_has_rt

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Message-ID: <20200127174549.GD1295@pauld.bos.csb>
Date:   Mon, 27 Jan 2020 12:45:49 -0500
From:   Phil Auld <pauld@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Kirill Tkhai <ktkhai@...tuozzo.com>,
        Juri Lelli <juri.lelli@...il.com>, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3]sched/rt: Stop for_each_process_thread() iterations in
 tg_has_rt_tasks()

On Mon, Jan 27, 2020 at 06:00:10PM +0100 Peter Zijlstra wrote:
> On Mon, Jan 27, 2020 at 11:56:38AM -0500, Phil Auld wrote:
> > On Mon, Jan 27, 2020 at 05:43:15PM +0100 Peter Zijlstra wrote:
> > > On Thu, Jan 23, 2020 at 04:56:19PM -0500, Phil Auld wrote:
> > > > Peter, is there any chance of taking something like this?
> > > 
> > > Whoopsy, looks like this fell on the floor. Can do I suppose.
> > > 
> > > Thanks!
> > > 
> > 
> > Thanks. Probably make sense at this point to use Konstantin's new version?
> > But they both do the trick.
> 
> Care to send it along?
> 

I think you were on the CC, but here's a link:

https://lkml.org/lkml/2020/1/25/167

It's called: 

[PATCH] sched/rt: optimize checking group rt scheduler constraints

It does a little bit more and needs an "|=" changed to "=". And actually
looking at it again, it should probably just have a break in the loop.

I'll make that comment in the thread for it.


Thanks,
Phil

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