On 2018-06-13 18:02, Eric Blake wrote: > On 06/13/2018 10:47 AM, Denis Plotnikov wrote: >> The command enables/disables copy-on-read mode for VM's disk while >> VM is running. >> >> This is needed when using external disk readers to shape access pattern >> to the disk backend. >> >> Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com> >> --- > > Deferring thoughts on the actual design for later;
But why? ;-) This patch would definitely be superseded by a block reconfiguration command (i.e. presumably one that makes reopen accessible over QMP). With such a command, you could insert or remove a copy-on-read filter node at any point in time. Since we definitely want block graph configuration, I don't think we want to add special commands now. Max
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