From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: Yang Xu <xuyang2018.jy@cn.fujitsu.com>,
fstests <fstests@vger.kernel.org>
Subject: Re: generic/269 hangs on lastest upstream kernel
Date: Wed, 19 Feb 2020 10:20:20 -0500 [thread overview]
Message-ID: <20200219152020.GH330201@mit.edu> (raw)
In-Reply-To: <20200219124324.GO16121@quack2.suse.cz>
On Wed, Feb 19, 2020 at 01:43:24PM +0100, Jan Kara wrote:
> This means, fsstress command has queued cache flush request (from
> blkdev_issue_flush()), this has been dispatched to the driver ('D' event)
> but it has never been completed by the driver and so blkdev_issue_flush()
> never returns.
>
> To debug this further, you probably need to start looking into what happens
> with the request inside QEMU. There's not much I can help you with at this
> point since I'm not an expert there. Do you use image file as a backing store
> or a raw partition?
This is looking more and more like a Qemu bug or a host OS issue.
Yang is using a two year old Qemu (qemu-kvm-2.12.0-32.el8+1900+70997154)
and is using a QCOW backing file. It also could be a host kernel bug,
although that's less likely.
Yang, any chance you could have a chance to upgrade to a newer version
of Qemu, and see if the problem goes away? If you have a RHEL support
contract, perhaps you could file a support request with the Red Hat help desk?
- Ted
next prev parent reply other threads:[~2020-02-19 15:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 8:14 generic/269 hangs on lastest upstream kernel Yang Xu
2020-02-12 10:54 ` Jan Kara
2020-02-13 8:49 ` Yang Xu
2020-02-13 17:08 ` Theodore Y. Ts'o
2020-02-14 1:14 ` Yang Xu
2020-02-14 14:05 ` Theodore Y. Ts'o
[not found] ` <7adf16bf-d527-1c25-1a24-b4d5e4d757c4@cn.fujitsu.com>
2020-02-18 14:35 ` Theodore Y. Ts'o
2020-02-19 10:57 ` Yang Xu
2020-02-13 21:10 ` Jan Kara
[not found] ` <062ac52c-3a16-22ef-6396-53334ed94783@cn.fujitsu.com>
2020-02-14 15:00 ` Jan Kara
2020-02-18 3:25 ` Yang Xu
2020-02-18 8:24 ` Jan Kara
2020-02-18 9:46 ` Yang Xu
2020-02-18 11:03 ` Jan Kara
2020-02-19 10:09 ` Yang Xu
[not found] ` <73af3d5c-ca64-3ad3-aee2-1e78ee4fae4a@cn.fujitsu.com>
2020-02-19 12:43 ` Jan Kara
2020-02-19 15:20 ` Theodore Y. Ts'o [this message]
2020-02-20 1:35 ` Yang Xu
2020-02-25 6:03 ` Yang Xu
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