Re: [PATCH v2 1/2] mm: Export nr_swap_pages

Johannes Weiner
2015-12-23T22:04:48Z

On Thu, Dec 10, 2015 at 10:32:42AM +0100, Daniel Vetter wrote:
> On Fri, Dec 04, 2015 at 11:09:52AM -0500, Johannes Weiner wrote:
> > On Fri, Dec 04, 2015 at 03:58:53PM +0000, Chris Wilson wrote:
> > > Some modules, like i915.ko, use swappable objects and may try to swap
> > > them out under memory pressure (via the shrinker). Before doing so, they
> > > want to check using get_nr_swap_pages() to see if any swap space is
> > > available as otherwise they will waste time purging the object from the
> > > device without recovering any memory for the system. This requires the
> > > nr_swap_pages counter to be exported to the modules.
> > >
> > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > > Cc: "Goel, Akash" <akash.goel@intel.com>
> > > Cc: Johannes Weiner <hannes@cmpxchg.org>
> > > Cc: linux-mm@kvack.org
> >
> > Acked-by: Johannes Weiner <hannes@cmpxchg.org>
>
> Ack for merging this through drm-intel trees for 4.5? I'm a bit unclear
> who's ack I need for that for linux-mm topics ...

Andrew would be the -mm maintainer. CC'd.