From: Mike Snitzer <snitzer@redhat.com>
To: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>,
device-mapper development <dm-devel@redhat.com>
Subject: Re: v4.3-rc2 dm-mq bug
Date: Thu, 24 Sep 2015 19:01:03 -0400 [thread overview]
Message-ID: <20150924230103.GA17394@redhat.com> (raw)
In-Reply-To: <56046AD7.7080400@sandisk.com>
On Thu, Sep 24 2015 at 5:27pm -0400,
Bart Van Assche <bart.vanassche@sandisk.com> wrote:
> On 09/24/2015 02:18 PM, Mike Snitzer wrote:
> >p.s. Bart, why is your test destroying the DM mpath device while it is
> >issuing IO to the device? ;)
>
> Removing SCSI device instances created by the SRP initiator while
> I/O is being submitted is a great way to stress-test the SRP
> initiator driver but apparently the test I'm running triggers bugs
> in other drivers than the SRP initiator driver ...
I'm not referring to the removal of a DM mpath device's underlying SRP
paths. The __dm_destroy() path is only used when destroying a DM
device. The only DM device used by multipath is the DM mpath device.
So somehow your test is running the equivalent of:
dmsetup remove <toplevel_DM_mpath_device>
While IO is being issued directly to that device.
next prev parent reply other threads:[~2015-09-24 23:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-24 19:09 v4.3-rc2 dm-mq bug Bart Van Assche
2015-09-24 21:18 ` Mike Snitzer
2015-09-24 21:27 ` Bart Van Assche
2015-09-24 23:01 ` Mike Snitzer [this message]
2015-09-25 15:34 ` Bart Van Assche
2015-09-25 18:49 ` Mike Snitzer
2015-09-25 0:37 ` Junichi Nomura
2015-09-25 2:13 ` Mike Snitzer
2015-09-25 15:37 ` Bart Van Assche
2015-09-30 0:42 ` Junichi Nomura
2015-09-30 2:54 ` Bart Van Assche
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