From: Paolo Valente <paolo.valente@linaro.org>
To: Tejun Heo <tj@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
Johannes Thumshirn <jthumshirn@suse.de>,
Ulf Hansson <ulf.hansson@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>,
Fam Zheng <fam@euphon.net>
Subject: Re: [PATCH block/for-5.2-fixes] bfq: use io.weight interface file instead of io.bfq.weight
Date: Fri, 14 Jun 2019 23:05:36 +0200 [thread overview]
Message-ID: <78B23D07-0EF6-4FBA-8B21-5C028699C450@linaro.org> (raw)
In-Reply-To: <20190614202222.GC657710@devbig004.ftw2.facebook.com>
> Il giorno 14 giu 2019, alle ore 22:22, Tejun Heo <tj@kernel.org> ha scritto:
>
> Hello,
>
> On Thu, Jun 13, 2019 at 08:10:38AM +0200, Paolo Valente wrote:
>> BFQ does not implement weight_device, but we are not talking about
>> weight_device here. More precisely, *nothing* implements weight_device
>> any longer in cgroups-v1, so the documentation is wrong altogether.
>
> I can't see how renaming an interface file which has different
> behaviors on the same input to the same name is something acceptable.
> Imagine how confusing that'd be to userspace. If you want to rename
> the control knob to io.weight, please implement full semantics for
> both cgroup1 and cgroup2.
>
I want to, and I've tried to make it easier for you to point me to
what is missing exactly. Once again, the only missing piece I see are
per-device weights.
> I just posted a separate io.weight implementation for cgroup2 but it's
> easy to provide a way to override the interface files when bfq gets
> selected, so let me know when you have a working implementation of the
> interface.
>
Ok, thanks. I'll ping you when also per-device weights are available
in BFQ's interface.
Thanks,
Paolo
> Thanks.
>
> --
> tejun
next prev parent reply other threads:[~2019-06-14 21:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-08 8:20 [GIT PULL] Block fixes for 5.2-rc4 Jens Axboe
2019-06-08 19:28 ` Linus Torvalds
2019-06-09 5:59 ` Jens Axboe
2019-06-09 16:06 ` Linus Torvalds
2019-06-10 10:15 ` Jens Axboe
2019-06-10 14:49 ` Paolo Valente
2019-06-10 15:48 ` Tejun Heo
2019-06-11 19:49 ` [PATCH block/for-5.2-fixes] bfq: use io.weight interface file instead of io.bfq.weight Tejun Heo
2019-06-11 21:17 ` Tejun Heo
2019-06-12 7:32 ` Paolo Valente
2019-06-12 13:39 ` Tejun Heo
2019-06-13 6:10 ` Paolo Valente
2019-06-14 20:22 ` Tejun Heo
2019-06-14 21:05 ` Paolo Valente [this message]
2019-08-20 6:58 ` Paolo Valente
2019-06-08 19:30 ` [GIT PULL] Block fixes for 5.2-rc4 pr-tracker-bot
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