Am 24.09.2012 13:32, schrieb ching: > Hi all, > > My host is qemu-1.1.1 and x64 kernel 3.5.4. The guest is using aio="native" > > I am trying to use unsafe cache mode to boost i/o performance.
aio=native requires the image to be opened with O_DIRECT, i.e. cache=none or cache=directsync. If you specify a different cache option, it will silently fall back to aio=threads. Kevin
