linux-kernel - Re: [WIP PATCHSET 0/4] WIP branch for bfq-mq

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Date:   Fri, 10 Feb 2017 16:45:23 +0000
From:   Bart Van Assche <Bart.VanAssche@...disk.com>
To:     "tj@...nel.org" <tj@...nel.org>,
        "paolo.valente@...aro.org" <paolo.valente@...aro.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>
Subject: Re: [WIP PATCHSET 0/4] WIP branch for bfq-mq

On Tue, 2017-02-07 at 18:24 +0100, Paolo Valente wrote:
> 2) Enable people to test this first version bfq-mq.

Hello Paolo,

I installed this version of bfq-mq on a server that boots from a SATA
disk. That server boots fine with kernel v4.10-rc7 but not with this
tree. The first 30 seconds of the boot process seem to proceed normally
but after that time the messages on the console stop scrolling and
about another 30 seconds later the server reboots. I haven't found
anything useful in the system log. I configured the block layer as
follows:

$ grep '^C.*_MQ_' .config
CONFIG_BLK_MQ_PCI=y
CONFIG_MQ_IOSCHED_BFQ=y
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_NONE=y
CONFIG_DEFAULT_MQ_BFQ_MQ=y
CONFIG_DEFAULT_MQ_IOSCHED="bfq-mq"
CONFIG_SCSI_MQ_DEFAULT=y
CONFIG_DM_MQ_DEFAULT=y

Bart.