From: Jens Axboe <axboe@fb.com>
To: Paolo Valente <paolo.valente@linaro.org>
Cc: Jens Axboe <axboe@kernel.dk>, <linux-block@vger.kernel.org>,
Linux-Kernal <linux-kernel@vger.kernel.org>,
Mark Brown <broonie@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCHSET/RFC v2] Make legacy IO schedulers work with blk-mq
Date: Tue, 6 Dec 2016 08:29:53 -0700 [thread overview]
Message-ID: <84313e6b-c0c8-8713-2ad6-b4c3ff52e011@fb.com> (raw)
In-Reply-To: <EC2ECF84-10DC-4A9C-8951-D87607C492F0@linaro.org>
On 12/06/2016 03:01 AM, Paolo Valente wrote:
>
>> Il giorno 05 dic 2016, alle ore 19:26, Jens Axboe <axboe@fb.com> ha scritto:
>>
>> Version 2 of the hack/patchset, that enables blk-mq to use the legacy
>> IO schedulers with single queue devices. Original posting is here:
>>
>> https://marc.info/?l=linux-block&m=148073493203664&w=2
>>
>> You can also found this version in the following git branch:
>>
>> git://git.kernel.dk/linux-block blk-mq-legacy-sched.2
>>
>> and new developments/fixes will happen in the 'blk-mq-legacy-sched'
>> branch.
>>
>
> Hi Jens,
> while running some tests, the system hung after a while.
>
> If I'm not mistaken, the above branches contain a (modified) 4.9-rc1.
> Maybe instability follows from that? I have tried a rebase, but
> resulting conflicts are non-trivial (for me) to solve.
>
> Meanwhile, if you deem it useful, I can provide you with the oops
> message, as I catch it.
Please do. I run my testing with master pulled in, but I can rebase the
branch to include that.
> As a secondary issue, iostat always reports 0 MB/s for both reads and
> writes, while tps are non null.
Looks like only the inflight stuff worked, but the completion bytes. Let
me fix that up. Done.
OK, pull from:
git://git.kernel.dk/linux-block blk-mq-legacy-sched
and you'll get the latest and greatest, and merged to 4.9-rc8 as well.
--
Jens Axboe
prev parent reply other threads:[~2016-12-06 15:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-05 18:26 Jens Axboe
2016-12-05 18:27 ` [PATCH 1/7] block: use legacy path for flush requests for MQ with a scheduler Jens Axboe
2016-12-05 18:27 ` [PATCH 2/7] cfq-iosched: use appropriate run queue function Jens Axboe
2016-12-05 18:27 ` [PATCH 3/7] block: use appropriate queue running functions Jens Axboe
2016-12-05 18:27 ` [PATCH 4/7] blk-mq: blk_account_io_start() takes a bool Jens Axboe
2016-12-05 18:27 ` [PATCH 5/7] blk-mq: add BLK_MQ_F_NO_SCHED flag Jens Axboe
2016-12-05 18:27 ` [PATCH 6/7] blk-mq: test patch to get legacy IO schedulers working Jens Axboe
2016-12-05 18:27 ` [PATCH 7/7] block: drop irq+lock when flushing queue plugs Jens Axboe
2016-12-06 10:01 ` [PATCHSET/RFC v2] Make legacy IO schedulers work with blk-mq Paolo Valente
2016-12-06 15:29 ` Jens Axboe [this message]
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