[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 02/12] mm: add 'foreign' alias for the 'pinned' page flag
On Tue, Jan 06, 2015 at 06:57:27PM +0000, David Vrabel wrote: > From: Jenny Herbert <jennifer.herbert@xxxxxxxxxx> > > The foreign page flag will be used by Xen guests to mark pages that > have grant mappings of frames from other (foreign) guests. > > The foreign flag is an aliases the existing (Xen-specific) pinned is an alias for the .. > flag. This is safe because pinned is only used on pages used for page > tables and these cannot also be foreign. > > Signed-off-by: Jenny Herbert <jennifer.herbert@xxxxxxxxxx> > Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx> > --- > include/linux/page-flags.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h > index e1f5fcd..7734cc8 100644 > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -123,6 +123,7 @@ enum pageflags { > /* XEN */ > PG_pinned = PG_owner_priv_1, > PG_savepinned = PG_dirty, > + PG_foreign = PG_owner_priv_1, > > /* SLOB */ > PG_slob_free = PG_private, > @@ -215,6 +216,7 @@ __PAGEFLAG(Slab, slab) > PAGEFLAG(Checked, checked) /* Used by some filesystems */ > PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen */ > PAGEFLAG(SavePinned, savepinned); /* Xen */ > +PAGEFLAG(Foreign, foreign); /* Xen */ > PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved) > PAGEFLAG(SwapBacked, swapbacked) __CLEARPAGEFLAG(SwapBacked, swapbacked) > __SETPAGEFLAG(SwapBacked, swapbacked) > -- > 1.7.10.4 > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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