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Re: [Qemu-devel] [PATCH] block: Add -drive detect_zero=on|off option to

From: Richard W.M. Jones
Subject: Re: [Qemu-devel] [PATCH] block: Add -drive detect_zero=on|off option to detect all zero writes.
Date: Mon, 30 Jul 2012 14:51:36 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Fri, Jul 27, 2012 at 09:01:38PM +0200, Paolo Bonzini wrote:
> Or just finish up discard support and use the existing fstrim command of
> qemu-ga.  :)

What's actually involved to do this?  I noticed that a virtio-scsi on
qcow2 v3 device exported to the guest does not appear to support TRIM
at all (see attached test script and output).


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

Attachment: test.sh
Description: Bourne shell script

Attachment: test-output.txt
Description: Text document

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