From: Christian Borntraeger <borntraeger@de.ibm.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
kvm list <kvm@vger.kernel.org>, Halil Pasic <pasic@linux.ibm.com>
Subject: Re: vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot
Date: Tue, 7 Jan 2020 09:59:16 +0100 [thread overview]
Message-ID: <08ae8d28-3d8c-04e8-bdeb-0117d06c6dc7@de.ibm.com> (raw)
In-Reply-To: <20200106054041-mutt-send-email-mst@kernel.org>
On 06.01.20 11:50, Michael S. Tsirkin wrote:
> On Wed, Dec 18, 2019 at 04:59:02PM +0100, Christian Borntraeger wrote:
>> On 18.12.19 16:10, Michael S. Tsirkin wrote:
>>> On Wed, Dec 18, 2019 at 03:43:43PM +0100, Christian Borntraeger wrote:
>>>> Michael,
>>>>
>>>> with
>>>> commit db7286b100b503ef80612884453bed53d74c9a16 (refs/bisect/skip-db7286b100b503ef80612884453bed53d74c9a16)
>>>> vhost: use batched version by default
>>>> plus
>>>> commit 6bd262d5eafcdf8cdfae491e2e748e4e434dcda6 (HEAD, refs/bisect/bad)
>>>> Revert "vhost/net: add an option to test new code"
>>>> to make things compile (your next tree is not easily bisectable, can you fix that as well?).
>>>
>>> I'll try.
>>>
>>>>
>>>> I get random crashes in my s390 KVM guests after reboot.
>>>> Reverting both patches together with commit decd9b8 "vhost: use vhost_desc instead of vhost_log" to
>>>> make it compile again) on top of linux-next-1218 makes the problem go away.
>>>>
>>>> Looks like the batched version is not yet ready for prime time. Can you drop these patches until
>>>> we have fixed the issues?
>>>>
>>>> Christian
>>>>
>>>
>>> Will do, thanks for letting me know.
>>
>> I have confirmed with the initial reporter (internal test team) that <driver name='qemu'/>
>> with a known to be broken linux next kernel also fixes the problem, so it is really the
>> vhost changes.
>
> OK I'm back and trying to make it more bisectable.
>
> I pushed a new tag "batch-v2".
> It's same code but with this bisect should get more information.
I get the following with this tag
drivers/vhost/net.c: In function ‘vhost_net_tx_get_vq_desc’:
drivers/vhost/net.c:574:7: error: implicit declaration of function ‘vhost_get_vq_desc_batch’; did you mean ‘vhost_get_vq_desc’? [-Werror=implicit-function-declaration]
574 | r = vhost_get_vq_desc_batch(tvq, tvq->iov, ARRAY_SIZE(tvq->iov),
| ^~~~~~~~~~~~~~~~~~~~~~~
| vhost_get_vq_desc
next prev parent reply other threads:[~2020-01-07 8:59 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 14:43 vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot Christian Borntraeger
2019-12-18 15:10 ` Michael S. Tsirkin
2019-12-18 15:59 ` Christian Borntraeger
2020-01-06 10:50 ` Michael S. Tsirkin
2020-01-07 8:59 ` Christian Borntraeger [this message]
2020-01-07 9:39 ` Michael S. Tsirkin
2020-01-07 11:34 ` Christian Borntraeger
2020-01-07 11:47 ` Michael S. Tsirkin
2020-01-07 11:55 ` Michael S. Tsirkin
2020-01-07 12:16 ` Christian Borntraeger
2020-01-20 6:27 ` Michael S. Tsirkin
2020-01-22 19:32 ` Christian Borntraeger
2020-02-06 14:22 ` eperezma
2020-02-06 15:12 ` Christian Borntraeger
2020-02-06 22:17 ` Michael S. Tsirkin
2020-02-07 7:47 ` Christian Borntraeger
2020-02-07 7:58 ` Michael S. Tsirkin
2020-02-07 8:13 ` Christian Borntraeger
2020-02-07 8:53 ` Cornelia Huck
2020-02-07 10:07 ` Michael S. Tsirkin
[not found] ` <CAJaqyWfngzP4d01B6+Sqt8FXN6jX7kGegjx8ie4no_1Er3igQA@mail.gmail.com>
2020-02-10 10:09 ` Christian Borntraeger
2020-02-10 11:01 ` Christian Borntraeger
2020-02-11 9:33 ` Eugenio Pérez
2020-02-11 9:56 ` Christian Borntraeger
2020-02-11 10:07 ` Christian Borntraeger
2020-02-11 13:04 ` Eugenio Pérez
2020-02-11 13:13 ` Christian Borntraeger
2020-02-12 16:34 ` Eugenio Pérez
2020-02-13 9:30 ` Christian Borntraeger
2020-02-13 10:47 ` Eugenio Pérez
2020-02-13 13:09 ` Christian Borntraeger
2020-02-13 16:29 ` Eugenio Pérez
2020-02-13 16:32 ` Christian Borntraeger
2020-02-14 7:06 ` Eugenio Pérez
2020-02-14 7:33 ` Christian Borntraeger
2020-02-14 7:40 ` Eugenio Perez Martin
2020-02-14 7:43 ` Christian Borntraeger
2020-02-14 7:47 ` Christian Borntraeger
2020-02-14 12:17 ` Eugenio Pérez
2020-02-14 12:22 ` Christian Borntraeger
2020-02-14 12:26 ` Eugenio Pérez
2020-02-14 12:34 ` Christian Borntraeger
2020-03-27 11:08 ` Eugenio Pérez
2020-03-27 15:46 ` Christian Borntraeger
2020-02-11 13:57 ` Michael S. Tsirkin
2020-03-27 8:03 ` Eugenio Perez Martin
2020-02-06 22:07 ` Michael S. Tsirkin
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=08ae8d28-3d8c-04e8-bdeb-0117d06c6dc7@de.ibm.com \
--to=borntraeger@de.ibm.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-next@vger.kernel.org \
--cc=mst@redhat.com \
--cc=pasic@linux.ibm.com \
--cc=sfr@canb.auug.org.au \
--cc=virtualization@lists.linux-foundation.org \
/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;
as well as URLs for NNTP newsgroup(s).