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

[Bart Van Assche]

On 02/10/2017 08:49 AM, Paolo Valente wrote:
>> $ 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
>>
> 
> Could you reconfigure with none or mq-deadline as default, check
> whether the system boots, and, it it does, switch manually to bfq-mq,
> check what happens, and, in the likely case of a failure, try to get
> the oops?

Hello Paolo,

I just finished performing that test with the following kernel config:
$ 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_DEADLINE=y
CONFIG_DEFAULT_MQ_IOSCHED="mq-deadline"
CONFIG_SCSI_MQ_DEFAULT=y
CONFIG_DM_MQ_DEFAULT=y

After the system came up I logged in, switched to the bfq-mq scheduler
and ran several I/O tests against the boot disk. Sorry but nothing
interesting appeared in the kernel log.

Bart.