* Paul Schlacter ([email protected]) wrote: > qemu version: 2.9.0 > image: centos 7.2 1511 raw > cache mode: writeback > > > In centos7.2 time, the use of writeback and none, the result of dd disk is > the same io, no change > > But I replaced centos7.1 centos7.3 centos7.4 when writeback was > significantly faster than none > > Would like to ask what is going on, how to solve ?
Hi Paul, Can you just clarify your setup please; do you mean that with the same qemu setup but a 7.2 guest rather than a 7.1/7.3 guest the behaviour changes? Dave -- Dr. David Alan Gilbert / [email protected] / Manchester, UK
