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Re: [Qemu-devel] question about commit: "block: implement is_allocated f


From: Paolo Bonzini
Subject: Re: [Qemu-devel] question about commit: "block: implement is_allocated for raw"
Date: Fri, 20 Jul 2012 11:09:20 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1

Il 20/07/2012 11:07, Alexandre DERUMIER ha scritto:
> Hi,
> 
> I have a question about commit 
> http://git.qemu.org/?p=qemu.git;a=commit;h=5500316ded9db5b10072334cde1e27fb37682240
> "block: implement is_allocated for raw"
> 
> Does it works with virtio-blk ? Or does it discard support ?

It is unrelated to virtio-blk.  is_allocated is only used internally
(qemu-img convert and online streaming).  In the future it may be
accessible to SCSI devices via the GET LBA STATUS command.

It is part of improving support.  I hope to get that in 1.2, but
honestly it's not too likely.

Paolo



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