From: Jens Axboe <axboe@kernel.dk>
To: Paolo Valente <paolo.valente@linaro.org>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
ulf.hansson@linaro.org, linus.walleij@linaro.org,
bfq-iosched@googlegroups.com, oleksandr@natalenko.name
Subject: Re: [PATCH BUGFIX IMPROVEMENT V2 0/1] block, bfq: eliminate latency regression with fast drives
Date: Tue, 16 Jul 2019 08:11:49 -0600 [thread overview]
Message-ID: <6867cf11-d7f8-cadf-b9ec-85549bb86af3@kernel.dk> (raw)
In-Reply-To: <20190715105719.20353-1-paolo.valente@linaro.org>
On 7/15/19 4:57 AM, Paolo Valente wrote:
> [V2 that should apply cleanly on current HEAD]
>
> Hi Jens,
> I've spotted a regression on a fast SSD: a loss of I/O-latency control
> with interactive tasks (such as the application start up I usually
> test). Details in the commit.
>
> I do hope that, after proper review, this commit makes it for 5.3.
If it's a regression, it should have a Fixes: line telling us which
commit originally introduced the regression. This is important for
folks doing backports. Can you add that?
--
Jens Axboe
next prev parent reply other threads:[~2019-07-16 14:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-15 10:57 [PATCH BUGFIX IMPROVEMENT V2 0/1] block, bfq: eliminate latency regression with fast drives Paolo Valente
2019-07-15 10:57 ` [PATCH BUGFIX IMPROVEMENT V2 1/1] block, bfq: check also in-flight I/O in dispatch plugging Paolo Valente
2019-07-16 14:11 ` Jens Axboe [this message]
2019-07-18 7:06 ` [PATCH BUGFIX IMPROVEMENT V2 0/1] block, bfq: eliminate latency regression with fast drives Paolo Valente
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