Re: [Xen-devel] [PATCH v2] xen/arm: p2m: Don't create new table when the mapping is removed

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-12-20 at 09:15 +0000, Ian Campbell wrote:
> On Fri, 2013-12-20 at 01:41 +0000, Julien Grall wrote:
> > When  Xen is removing/relinquishing mapping, it will create second/third 
> > tables
> > if they don't exist.
> > 
> > Non-existent table means the address range was never mapped, so Xen can 
> > safely
> > skip them.
> > 
> > Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> > Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > 
> > ---
> >     Release: This is an improvement for Xen 4.4. It will save time during
> >     relinquish phase and avoid dummy allocation.
> 
> (Release: implies it should have been CCd to George)
> 
> I would go further than what you say though: This is removing a
> potential guest induced long running operation and is therefore a clear
> bug fix (and a potential security bug at that). I intend to apply this
> (assuming it is OK, I haven't actually read this version yet).

and on that basis now acked + applied.

Ian.


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