Paul Brook wrote: > > That'll depend on what kind of device is emulated. Does the SCSI > > emulation handle multiple in-flight commands with any guarantee on > > order? > > SCSI definitely allows (and we emulate) multiple in flight commands. > I can't find any requirement that writes must complete before a > subsequent SYNCHRONISE_CACHE. However I don't claim to know the spec > that well,
Aren't there SCSI tagged barrier commands or something like that, which allow a host to request ordering between commands? > it's probably not a bad idea have them complete anyway. Preferably > this would be a completely asynchronous operation. i.e. the sync > command returns immediately, but only completes when all preceding > writes have completed and been flushed to disk. I agree, that seems the optimal implementation. -- Jamie ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
