[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xen/arm: map_domain_page: reuse slots with avail == 0
On Fri, 27 Sep 2013, Tim Deegan wrote: > At 18:45 +0100 on 27 Sep (1380307517), Stefano Stabellini wrote: > > If a slot has avail == 0 but still points to the right mfn, reuse it. > > > > Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> > > --- > > xen/arch/arm/mm.c | 15 ++++++++------- > > 1 files changed, 8 insertions(+), 7 deletions(-) > > > > diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c > > index 44ec0e3..cbcb769 100644 > > --- a/xen/arch/arm/mm.c > > +++ b/xen/arch/arm/mm.c > > @@ -232,7 +232,13 @@ void *map_domain_page(unsigned long mfn) > > i < DOMHEAP_ENTRIES; > > slot = (slot + 1) % DOMHEAP_ENTRIES, i++ ) > > { > > - if ( map[slot].pt.avail == 0 ) > > + if ( map[slot].pt.avail < 0xf && map[slot].pt.base == slot_mfn ) > > This needs to check pt.valid as well, in case this path is ever used to > map frame 0. right _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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