From: Ryan Harper <ryanh@us.ibm.com>
To: Mike Snitzer <snitzer@redhat.com>
Cc: Ryan Harper <ryanh@us.ibm.com>, Tejun Heo <tj@kernel.org>,
Mikulas Patocka <mpatocka@redhat.com>,
dm-devel@redhat.com, Vivek Goyal <vgoyal@redhat.com>,
john.cooper@redhat.com, rusty@rustcorp.com.au, hch@infradead.org,
kvm@vger.kernel.org
Subject: Re: [REGRESSION][BISECTED] virtio-blk serial attribute causes guest to hang [Was: Re: [PATCH UPDATED 4/5] dm: implement REQ_FLUSH/FUA support for request-based dm]
Date: Thu, 9 Sep 2010 13:35:54 -0500 [thread overview]
Message-ID: <20100909183554.GK30086@us.ibm.com> (raw)
In-Reply-To: <20100909175537.GA9589@redhat.com>
* Mike Snitzer <snitzer@redhat.com> [2010-09-09 12:56]:
> On Thu, Sep 09 2010 at 12:03pm -0400,
> Ryan Harper <ryanh@us.ibm.com> wrote:
>
> > * Mike Snitzer <snitzer@redhat.com> [2010-09-09 10:58]:
>
> > > I'm using virtio-blk w/ cache=none for the root device. virtio-blk
> > > isn't used for any other devices in the guest.
> >
> > And you don't have any other disks in the guest (I see just the root and
> > the cdrom), the lv stuff is happening against some sort of dummy target?
>
> Correct. I have used variants of the script I provided against both
> scsi-debug devices and iscsi devices in the guest. The script I shared
> uses multipath on scsi-debug (ram-based) devices.
>
> That script causes udev to run its various callouts via multipath and
> LVM (both packages, upstream and RHEL6, now use udev).
>
> I have verified that I no longer get the hang if I switch the root
> device from virtio to ide.
And in the failing case, do you see:
/sys/block/vda/serial
attribute in sysfs?
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ryanh@us.ibm.com
next prev parent reply other threads:[~2010-09-09 18:36 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100902032246.GA31484@redhat.com>
2010-09-09 15:26 ` [REGRESSION][BISECTED] virtio-blk serial attribute causes guest to hang [Was: Re: [PATCH UPDATED 4/5] dm: implement REQ_FLUSH/FUA support for request-based dm] Mike Snitzer
2010-09-09 15:44 ` Ryan Harper
2010-09-09 15:57 ` Mike Snitzer
2010-09-09 16:03 ` Ryan Harper
2010-09-09 17:55 ` Mike Snitzer
2010-09-09 18:35 ` Ryan Harper [this message]
2010-09-09 19:15 ` Mike Snitzer
2010-09-09 19:43 ` Mike Snitzer
2010-09-09 20:14 ` Mike Snitzer
2010-09-09 20:30 ` Ryan Harper
2010-09-09 21:00 ` [PATCH] virtio-blk: put request that was created to retrieve the device id Mike Snitzer
2010-09-09 21:15 ` Christoph Hellwig
2010-09-17 14:58 ` Ryan Harper
2010-09-21 21:00 ` Christoph Hellwig
2010-10-08 16:06 ` [2.6.36 REGRESSION] " Mike Snitzer
2010-10-09 1:41 ` [PATCH] " Rusty Russell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100909183554.GK30086@us.ibm.com \
--to=ryanh@us.ibm.com \
--cc=dm-devel@redhat.com \
--cc=hch@infradead.org \
--cc=john.cooper@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mpatocka@redhat.com \
--cc=rusty@rustcorp.com.au \
--cc=snitzer@redhat.com \
--cc=tj@kernel.org \
--cc=vgoyal@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox