From: Christoph Hellwig <hch@infradead.org>
To: Michael Monnerie <michael.monnerie@is.it-management.at>
Cc: xfs@oss.sgi.com
Subject: Re: puzzling error: XenServer, LVM and XFS
Date: Thu, 27 May 2010 07:51:53 -0400 [thread overview]
Message-ID: <20100527115153.GB13112@infradead.org> (raw)
In-Reply-To: <201005270857.39048@zmi.at>
On Thu, May 27, 2010 at 08:57:38AM +0200, Michael Monnerie wrote:
> May 27 08:32:11 zdb13 kernel: [ 738.046895] end_request: I/O error, dev
> xvdc, sector 0
>
> This only happens after XFS is mounted from the LVM volume. On another
> machine where active I/O is happening, I get tons of these errors every
> some seconds.
This looks like the Xen block device code is buggy and doesn't handle
the I/O pattern XFS throws at it. A sector 0 error during mount usually
is the superblock barrier test write. To verify that assumptions
try mounting the XFS filesystems with -o nobarrier and see if it goes
away. Note that this is only for testing, and I would _not_ recommend
it for production use. If it makes the error go away please file
a bug with the Xen guys to fix their barrier support by either
implementing it properly or not advertizing it.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2010-05-27 11:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-27 6:57 puzzling error: XenServer, LVM and XFS Michael Monnerie
2010-05-27 11:51 ` Christoph Hellwig [this message]
2010-05-30 8:55 ` Michael Monnerie
2010-05-30 9:00 ` Michael Monnerie
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=20100527115153.GB13112@infradead.org \
--to=hch@infradead.org \
--cc=michael.monnerie@is.it-management.at \
--cc=xfs@oss.sgi.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