From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Paolo Bonzini <pbonzini@redhat.com>, qemu-block@nongnu.org
Cc: qemu-devel <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] strange crash in tracked_request_begin
Date: Mon, 7 Mar 2016 14:40:05 +0100 [thread overview]
Message-ID: <56DD84B5.8010206@de.ibm.com> (raw)
In-Reply-To: <56DD8399.1000504@redhat.com>
On 03/07/2016 02:35 PM, Paolo Bonzini wrote:
>
>
> On 07/03/2016 13:29, Christian Borntraeger wrote:
>> Folks,
>>
>> I had a crash of a qemu guest in tracked_request_begin.
>> The testcase was a guest with ramdisk/kernel that reboots in a
>> loop. (about 10 times per second) with a single null-co disk
>> attached.
>
> Does it use a separate iothread?
yes
libvirt kludge (why is there no null-co/null-aio in libvirt?) looks like
<qemu:commandline>
<qemu:arg value='-drive'/>
<qemu:arg value='driver=null-co,id=null8,if=none,size=100G'/>
<qemu:arg value='-device'/>
<qemu:arg value='virtio-blk-ccw,scsi=off,drive=null8,serial=null8,iothread=iothread1'/>
</qemu:commandline>
next prev parent reply other threads:[~2016-03-07 13:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-07 12:29 [Qemu-devel] strange crash in tracked_request_begin Christian Borntraeger
2016-03-07 13:35 ` Paolo Bonzini
2016-03-07 13:40 ` Christian Borntraeger [this message]
2016-03-07 17:01 ` Stefan Hajnoczi
2016-03-07 19:00 ` Christian Borntraeger
2016-03-08 10:06 ` Stefan Hajnoczi
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=56DD84B5.8010206@de.ibm.com \
--to=borntraeger@de.ibm.com \
--cc=pbonzini@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=stefanha@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.