From: Bharata B Rao <bharata@linux.vnet.ibm.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: josh.durgin@dreamhost.com, tailai.ly@taobao.com,
Peter Lieven <pl@kamp.de>,
qemu-devel@nongnu.org, rjones@redhat.com, stefanha@redhat.com,
morita.kazutaka@lab.ntt.co.jp
Subject: Re: [Qemu-devel] block: Review of .has_zero_init use
Date: Wed, 26 Jun 2013 08:44:47 +0530 [thread overview]
Message-ID: <20130626031447.GD9966@in.ibm.com> (raw)
In-Reply-To: <20130625113911.GD3539@dhcp-200-207.str.redhat.com>
On Tue, Jun 25, 2013 at 01:39:11PM +0200, Kevin Wolf wrote:
>
> Can you please review for the gluster, rbd, sheepdog and ssh driver
> whether it's safe to assume that the image reads back as zeros after
> bdrv_create?
Gluster supports both file and block backends. While the above is true for
file backend (which uses ftruncate), the same is not true for
block backend (which uses lvcreate & lvresize).
So overall it is not safe to assume that an image on GlusterFS volume
reads back as zeroes after create.
Regards,
Bharata.
next prev parent reply other threads:[~2013-06-26 3:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-25 11:39 [Qemu-devel] block: Review of .has_zero_init use Kevin Wolf
2013-06-25 12:05 ` Richard W.M. Jones
2013-06-25 12:27 ` Kevin Wolf
2013-06-25 13:11 ` MORITA Kazutaka
2013-06-25 13:20 ` Kevin Wolf
2013-06-25 13:42 ` MORITA Kazutaka
2013-06-25 13:45 ` Kevin Wolf
2013-06-25 15:06 ` Josh Durgin
2013-06-26 3:14 ` Bharata B Rao [this message]
2013-06-26 5:59 ` Peter Lieven
2013-06-26 6:46 ` Bharata B Rao
2013-06-26 7:36 ` Kevin Wolf
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