linux-kernel - Re: v4.15 and I/O hang with BFQ

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Date:   Tue, 30 Jan 2018 22:40:03 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>
Cc:     paolo.valente@...aro.org, Ivan Kozik <ivan@...ios.org>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        bfq-iosched@...glegroups.com, Jens Axboe <axboe@...nel.dk>,
        linus.walleij@...aro.org
Subject: Re: v4.15 and I/O hang with BFQ

On Tue, Jan 30, 2018 at 03:30:28PM +0100, Oleksandr Natalenko wrote:
> Hi.
> 
...
>    systemd-udevd-271   [000] ....     4.311033: bfq_insert_requests: insert
> rq->0
>    systemd-udevd-271   [000] ...1     4.311037: blk_mq_do_dispatch_sched:
> not get rq, 1
>           cfdisk-408   [000] ....    13.484220: bfq_insert_requests: insert
> rq->1
>     kworker/0:1H-174   [000] ....    13.484253: blk_mq_do_dispatch_sched:
> not get rq, 1
> ===
> 
> Looks the same, right?

Yeah, same with before.

-- 
Ming