From: Christoph Hellwig <hch@infradead.org>
To: Michael Monnerie <michael.monnerie@is.it-management.at>
Cc: xfs@oss.sgi.com
Subject: Re: XFS and XEN
Date: Thu, 19 Feb 2009 14:35:52 -0500 [thread overview]
Message-ID: <20090219193552.GB22736@infradead.org> (raw)
In-Reply-To: <93532303b1bb223328b2aaf712e0022f@webmail.zmi.at>
On Tue, Feb 17, 2009 at 03:00:39PM +0100, Michael Monnerie wrote:
> "Christoph Hellwig" <hch@infradead.org> schrieb:
> > I'm not even sure the Xen driver implements barriers. I haven't done
> > much with Xen, but with the default kvm/qemu config I can completely
> > wreck ext3 and XFS filesystems. If using these virtualization solutions
> > make sure you do not cache the virtual block device in the host
> > pagecache, and that in doubt the write cache of the disk is turned off
> > as barriers most likely won't work through the virtualization stack.
>
> How can I do that?
Barriers are disabled using hdparm. To make sure qemu/kvm doesn't
cache your image file specify cache=off on the command line specifying
that virtual disk.
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next prev parent reply other threads:[~2009-02-19 19:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-17 8:59 XFS and XEN Michael Monnerie
2009-02-17 9:11 ` Christoph Hellwig
2009-02-17 14:00 ` Michael Monnerie
2009-02-19 19:35 ` Christoph Hellwig [this message]
2009-02-21 9:03 ` Michael Monnerie
2009-02-24 15:04 ` Michael Monnerie
2009-02-24 16:38 ` Christoph Hellwig
2009-02-25 6:40 ` Michael Monnerie
2009-03-05 6:44 ` Michael Monnerie
2009-03-03 20:56 ` Michael Monnerie
2009-03-04 2:42 ` Michael Monnerie
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