Re: [Xen-devel] [PATCH for-4.6] tools/libxc: linux: Don't use getpagesize() when unmapping the grants

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Tue, 2015-08-11 at 13:48 +0100, Ian Campbell wrote:
> On Fri, 2015-08-07 at 22:45 +0100, Wei Liu wrote:
> > On Fri, Aug 07, 2015 at 07:53:55PM +0100, Julien Grall wrote:
> > > The grants are based on the Xen granularity (i.e 4KB). While the 
> > > function
> > > to map grants for Linux (linux_gnttab_grant_map) is using the correct
> > > size (XC_PAGE_SIZE), the unmap one (linux_gnttab_munmap) is using
> > > getpagesize().
> > > 
> > > On domain using a page granularity different than Xen (this is the 
> > > case
> > > for AARCH64 guest using 64KB page), the unmap will be called with the
> > > wrong size.
> > > 
> > > Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> > > 
> > > ---
> > > Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> > > Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > > Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > > Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> > > 
> > 
> > Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> 
> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> 
> > I think this is a bug fix and should be applied for 4.6.

I took this as a release ack and applied.



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