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Date: Mon, 19 Nov 2012 15:32:14 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] scsi-hd with discard_granularity and unmap results
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To: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: josh.durgin@inktank.com, qemu-devel@nongnu.org, sage@newdream.net

Il 19/11/2012 15:16, Stefan Priebe - Profihost AG ha scritto:
> Hi Paolo,
> Hi Josh,
> 
> i started to port the iscsi fixes to rbd. The one think i'm missing is.
> How to tell / call rbd to cancel I/O on the server side?
> 
> I grepped librbd source code for abort / cancel but didn't find anything.
> 
> Qemu must be able to tell rbd to cancel a specific I/O request.

Just don't.  QEMU will wait for rbd to finish the operation, instead of
actually having it cancelled.

Paolo