From: Paolo Valente <paolo.valente@linaro.org>
To: Tejun Heo <tj@kernel.org>
Cc: 'Paolo Valente' via bfq-iosched <bfq-iosched@googlegroups.com>,
Angelo Ruocco <angelo.ruocco.90@gmail.com>,
Jens Axboe <axboe@kernel.dk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Li Zefan <lizefan@huawei.com>,
Angelo Ruocco <angeloruocco90@gmail.com>,
Dennis Zhou <dennis@kernel.org>,
Josef Bacik <josef@toxicpanda.com>,
Liu Bo <bo.liu@linux.alibaba.com>,
Bart Van Assche <bvanassche@acm.org>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-block <linux-block@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>,
broonie@kernel.org, oleksandr@natalenko.name,
cgroups@vger.kernel.org, linux-doc@vger.kernel.org,
Jonathan Corbet <corbet@lwn.net>
Subject: Re: [PATCH V2 00/10] unify the interface of the proportional-share policy in blkio/io
Date: Sun, 30 Dec 2018 11:25:25 +0100 [thread overview]
Message-ID: <F2A4E669-8C79-46D7-8A97-2C561FF5346B@linaro.org> (raw)
In-Reply-To: <20181227234144.GE2509588@devbig004.ftw2.facebook.com>
> Il giorno 28 dic 2018, alle ore 00:41, Tejun Heo <tj@kernel.org> ha scritto:
>
> Hello, Paolo.
>
> On Sun, Dec 23, 2018 at 12:00:14PM +0100, Paolo Valente wrote:
>> 4.21 is coming ... and the legacy proportional share interface will
>> be gone with cfq. This will break legacy code using the
>> proportional-share interface on top of bfq. This code may just fail
>> when trying to use interface files that don't exist any longer.
>
> Sounds like inheriting .cfq namespace would be the easiest. Would
> that work?
>
For bfq, yes, but what will, e.g., Josef do when he adds his new
proportional-share implementation? Will he add a new set of names not
used by any legacy piece of code?
What's the benefit of throwing away months of work, on which we agreed
before starting it, and that solves a problem already acknowledged by
interested parties?
Thanks,
Paolo
> Thanks.
>
> --
> tejun
next prev parent reply other threads:[~2018-12-30 10:25 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-19 10:34 [PATCH V2 00/10] unify the interface of the proportional-share policy in blkio/io Paolo Valente
2018-11-19 10:34 ` [PATCH V2 01/10] cgroup: add hook seq_show_cft with also the owning cftype as parameter Paolo Valente
2018-11-19 10:34 ` [PATCH V2 02/10] block, cgroup: pass cftype to functions that need to use it Paolo Valente
2018-11-19 10:34 ` [PATCH V2 03/10] cgroup: link cftypes of the same subsystem with the same name Paolo Valente
2018-11-19 10:34 ` [PATCH V2 04/10] cgroup: add owner name to cftypes Paolo Valente
2018-11-19 10:34 ` [PATCH V2 05/10] block, bfq: align min and default weights with the old cfq default Paolo Valente
2018-11-19 10:34 ` [PATCH V2 06/10] cgroup: make all functions of all cftypes be invoked Paolo Valente
2018-11-19 10:34 ` [PATCH V2 07/10] block, bfq: use standard file names for the proportional-share policy Paolo Valente
2018-11-19 10:34 ` [PATCH V2 08/10] block, throttle: allow sharing cgroup statistic files Paolo Valente
2018-11-19 10:34 ` [PATCH V2 09/10] doc, bfq-iosched: fix a few clerical errors Paolo Valente
2018-11-19 10:34 ` [PATCH V2 10/10] doc, bfq-iosched: make it consistent with the new cgroup interface Paolo Valente
2018-11-20 16:28 ` [PATCH V2 00/10] unify the interface of the proportional-share policy in blkio/io Tejun Heo
2018-11-20 16:50 ` Paolo Valente
2018-11-30 18:23 ` Paolo Valente
2018-11-30 18:42 ` Tejun Heo
2018-11-30 18:53 ` Paolo Valente
2018-12-10 13:45 ` Angelo Ruocco
2018-12-18 7:48 ` Paolo Valente
2018-12-18 16:41 ` Tejun Heo
2018-12-18 17:22 ` Paolo Valente
2018-12-18 18:05 ` Paolo Valente
2018-12-23 11:00 ` Paolo Valente
2018-12-27 23:41 ` Tejun Heo
2018-12-30 10:25 ` Paolo Valente [this message]
2019-01-02 16:03 ` Tejun Heo
2019-01-02 16:28 ` Paolo Valente
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