Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 11 Sep 2019 07:16:30 -0700
From:   Tejun Heo <tj@kernel.org>
To:     Paolo Valente <paolo.valente@linaro.org>
Cc:     Michal =?iso-8859-1?Q?Koutn=FD?= <mkoutny@suse.com>,
        Johannes Weiner <hannes@cmpxchg.org>, clm@fb.com,
        dennisz@fb.com, newella@fb.com, Li Zefan <lizefan@huawei.com>,
        Jens Axboe <axboe@kernel.dk>,
        Josef Bacik <josef@toxicpanda.com>,
        Josef Bacik <jbacik@fb.com>, kernel-team@fb.com,
        Rik van Riel <riel@surriel.com>, cgroups@vger.kernel.org,
        linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 08/10] blkcg: implement blk-iocost
Message-ID: <20190911141630.GV2263813@devbig004.ftw2.facebook.com>
References: <20190828220600.2527417-1-tj@kernel.org>
 <20190828220600.2527417-9-tj@kernel.org>
 <20190910125513.GA6399@blackbody.suse.cz>
 <20190910160855.GS2263813@devbig004.ftw2.facebook.com>
 <A69EF8D0-8156-46DB-A4DA-C5334764116E@linaro.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <A69EF8D0-8156-46DB-A4DA-C5334764116E@linaro.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hello,

On Wed, Sep 11, 2019 at 10:18:53AM +0200, Paolo Valente wrote:
> > The two being enabled at the same time doesn't make sense, so we can
> > just switch over to bfq when bfq is selected as the iosched.  I asked
> > what Paolo wanted to do in terms of interface a couple times now but
> > didn't get an answer and he posted a patch which makes the two
> > controllers conflict, so....  Paolo, so it looks like you want to
> > rename all bfq files to drop the bfq prefix, right?
> 
> Yep, mainly because ... this is the solution you voted and you
> yourself proposed [1] :)
> 
> [1] https://patchwork.kernel.org/patch/10988261/

So, that was then.  Since then the interface change has been published
and userspace, at least some of them, already had to adjust.  Now, I
don't have any opinion on the matter and flipping again will cause
inconveniences to some subset of users.  It's your call.

> >  I can implement
> > the switching if so.
> 
> That would be perfect.

Whichever way it gets decided, this is easy enough.  I'll prep a
patch.

Thanks.

-- 
tejun