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Re: [Qemu-devel] block: Review of .has_zero_init use

From: Bharata B Rao
Subject: Re: [Qemu-devel] block: Review of .has_zero_init use
Date: Wed, 26 Jun 2013 08:44:47 +0530
User-agent: Mutt/1.5.21 (2010-09-15)

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.


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