On Fri, Dec 04, 2015 at 03:58:54PM +0000, Chris Wilson wrote: > If the system has no available swap pages, we cannot make forward > progress in the shrinker by releasing active pages, only by releasing > purgeable pages which are immediately reaped. Take total_swap_pages into > account when counting up available objects to be shrunk and subsequently > shrinking them. By doing so, we avoid unbinding objects that cannot be > shrunk and so wasting CPU cycles flushing those objects from the GPU to > the system and then immediately back again (as they will more than > likely be reused shortly after). > > Based on a patch by Akash Goel. > > v2: frontswap registers extra swap pages available for the system, so it > is already include in the count of available swap pages. > > v3: Use get_nr_swap_pages() to query the currently available amount of > swap space. This should also stop us from shrinking the GPU buffers if > we ever run out of swap space. Though at that point, we would expect the > oom-notifier to be running and failing miserably... > > Reported-by: Akash Goel <akash.goel@xxxxxxxxx> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: linux-mm@xxxxxxxxx > Cc: Akash Goel <akash.goel@xxxxxxxxx> > Cc: sourab.gupta@xxxxxxxxx Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
