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Re: [Qemu-devel] [PATCHv3 13/20] block: introduce bdrv_zeroize
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCHv3 13/20] block: introduce bdrv_zeroize |
Date: |
Wed, 02 Oct 2013 10:51:02 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
On 09/24/2013 07:35 AM, Peter Lieven wrote:
> this patch adds a call to completely zero out a block device.
> the operation is sped up by checking the block status and
> only writing zeroes to the device if they currently do not
> return zeroes. optionally the zero writing can be sped up
> by setting the flag BDRV_REQ_MAY_UNMAP to emulate the zero
> write by unmapping if the driver supports it.
>
> Signed-off-by: Peter Lieven <address@hidden>
> ---
> block.c | 37 +++++++++++++++++++++++++++++++++++++
> include/block/block.h | 1 +
> 2 files changed, 38 insertions(+)
>
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- Re: [Qemu-devel] [PATCHv3 13/20] block: introduce bdrv_zeroize,
Eric Blake <=