On Wed, Aug 31, 2016 at 02:30:31PM -0700, Andrew Morton wrote: > On Wed, 31 Aug 2016 10:14:59 +0100 Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> wrote: > > > > 2506952 __ 2% +28.1% 3212076 __ 7% vm-scalability.throughput > > > 1207402 __ 7% +22.3% 1476578 __ 6% vmstat.swap.so > > > 10.86 __ 12% -23.4% 8.31 __ 16% perf-profile.cycles-pp._raw_spin_lock_irq.__add_to_swap_cache.add_to_swap_cache.add_to_swap.shrink_page_list > > > 10.82 __ 13% -33.1% 7.24 __ 14% perf-profile.cycles-pp._raw_spin_lock_irqsave.__remove_mapping.shrink_page_list.shrink_inactive_list.shrink_zone_memcg > > > 10.36 __ 11% -100.0% 0.00 __ -1% perf-profile.cycles-pp._raw_spin_lock_irqsave.__test_set_page_writeback.bdev_write_page.__swap_writepage.swap_writepage > > > 10.52 __ 12% -100.0% 0.00 __ -1% perf-profile.cycles-pp._raw_spin_lock_irqsave.test_clear_page_writeback.end_page_writeback.page_endio.pmem_rw_page > > > > > > > I didn't see anything wrong with the patch but it's worth highlighting > > that this hunk means we are now out of GFP bits. > > Well ugh. What are we to do about that? > It'll stop silent breakage so Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Whoever hits it will need to take similar steps we had to with page->flags by making some 64-bit only, removing flags or inferring the flag values from other sources. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>