From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bart Van Assche <bart.vanassche@sandisk.com>
Subject: Re: 4.1-rc2 dm-multipath-mq kernel warning
Date: Wed, 27 May 2015 17:29:46 +0200
Message-ID: <5565E2EA.2000302@sandisk.com>
References: <5548CDE5.9@sandisk.com> <20150506022332.GA12096@redhat.com>
	<5549C68E.2050705@sandisk.com> <20150506182942.GA15545@redhat.com>
	<554B3C22.4060305@sandisk.com> <20150527125732.GA15911@redhat.com>
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To: Mike Snitzer <snitzer@redhat.com>
Cc: device-mapper development <dm-devel@redhat.com>
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On 05/27/15 14:57, Mike Snitzer wrote:
> Looks like Junichi likely fixed this issue you reported, please try this
> patch: https://patchwork.kernel.org/patch/6487321/

Hello Mike,

On a setup on which an I/O verification test passes with 
blk-mq/scsi-mq/dm-mq disabled, this is what fio reports after a few 
minutes with scsi-mq and dm-mq enabled:

test: Laying out IO file(s) (1 file(s) / 10MB)
fio: io_u error on file /mnt/test.0.0: Input/output error: write 
offset=8327168, buflen=4096
fio: io_u error on file /mnt/test.0.0: Input/output error: write 
offset=9007104, buflen=4096
fio: pid=4568, err=5/file:io_u.c:1564, func=io_u error, 
error=Input/output error

Bart.