Re: [Xen-devel] [Qemu-devel] [PATCH v2] xen_disk: support "direct-io-safe" backend option

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

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.stabellini@xxxxxxxxxxxxx> 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.

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