Il 06/03/2013 19:32, Jeff Cody ha scritto: > On Wed, Mar 06, 2013 at 06:50:56PM +0100, Peter Lieven wrote: >> Looking at the source I have not found a place where bs->growable is set to >> 0 for any >> block driver, maybe I miss something. Having bs->growable for iSCSI would >> also be ok. >> >> Shouldn't it be possible to call bdrv_drain_all() any time? There are other >> places >> where this is called. One I have in mind is e.g. if you cancel an ongoing >> block migration. > > That is a good point - what happens to QCOW now, if there is a block > job in progress (e.g. block-commit, block-stream, etc...)? I would > imagine -EBUSY gets thrown, since bdrv_truncate() checks > bdrv_in_use().
No, bs->file is not marked in use. Only bs is. Paolo
