On Mon, Jul 30, 2012 at 11:25:51AM +0930, Rusty Russell wrote: > I consider this approach a half-way step. Quick attempts on my laptop > and I couldn't find a case where the bio path was a loss, but in theory > if the host wasn't doing any reordering and it was a slow device, you'd > want the guest to do so. > > I'm not sure if current qemu can be configured to do such a thing?
The host kernel will do the I/O scheduling for you unless you explicitly disable it. And we should be able to assume an administrator will only disable it when they have a reason for it - if not they'll get worse performance for non-virtualized workloads as well. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
