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Re: [Qemu-devel] block: Review of .has_zero_init use
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From: |
Bharata B Rao |
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Subject: |
Re: [Qemu-devel] block: Review of .has_zero_init use |
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Date: |
Wed, 26 Jun 2013 08:44:47 +0530 |
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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.
Regards,
Bharata.