Re: linux-aio usable?

Michael Tokarev
2010-03-08T20:19:36Z

Michael Tokarev wrote:
[]
> Apparently that does not quite work. I just re-compiled kvm with
> --enable-linux-aio (actually I just installed libaio-dev on debian
> and qemu-kvm's configure picked it up automatically), and tried
> a guest. But any I/O fails.

It has nothing to do with kvm. It is compat_ioctl32 in the kernel
wrt aio calls. Historically I've a 64bit kernel with 32bit userland,
and tried 32bit kvm too, and that does not work. But 64bit kvm works
just fine with aio, and the performance numbers are indeed better.

Thanks!

/mjt