Alex Bligh writes ("Re: [Qemu-devel] [PATCH v2] xen_disk: support
"direct-io-safe" backend option"):
> Stefano,
> --On 27 June 2013 19:16:30 +0100 Stefano Stabellini
> <stefano.stabell...@eu.citrix.com> wrote:
>
> > * Therefore this option gives the backend permission to use
> > * O_DIRECT, notwithstanding that bug.
>
> Looks useful. Are you planning to do this for both emulated and pv
> disks?
Emulated disks don't have the same problem because they don't try to
use O_DIRECT on pages shared with the guest via the Xen grant table
mechanism.
Ian.
