On Fri, Mar 2, 2018 at 10:45 AM, Mick <michaelkintz...@gmail.com> wrote: > On Friday, 2 March 2018 15:33:02 GMT R0b0t1 wrote: >> You can pass a block device directly to QEMU, and this is recommended >> for performance reasons. > > Does it make a measurable difference, after the guest OS has booted? > > I'll need to try this out. :-) >
If I remember right it makes a huge difference in raw IO speed, but one of the most noticeable benefits is that there are no delays as filesystem cache is flushed to service VM IO operations (which would be noticed outside of the VM as well).
