On 21 Jul 2021, at 2:39, Huang Ying wrote: > From: Keith Busch <kbusch@xxxxxxxxxx> > > Reclaim anonymous pages if a migration path is available now that demotion > provides a non-swap recourse for reclaiming anon pages. > > Note that this check is subtly different from the can_age_anon_pages() > checks. This mechanism checks whether a specific page in a specific > context can actually be reclaimed, given current swap space and cgroup > limits. > > can_age_anon_pages() is a much simpler and more preliminary check which > just says whether there is a possibility of future reclaim. > > Link: https://lkml.kernel.org/r/20210715055145.195411-8-ying.huang@xxxxxxxxx > Cc: Keith Busch <kbusch@xxxxxxxxxx> > Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx> > Reviewed-by: Yang Shi <shy828301@xxxxxxxxx> > Cc: Michal Hocko <mhocko@xxxxxxxx> > Cc: Zi Yan <ziy@xxxxxxxxxx> > Cc: Wei Xu <weixugc@xxxxxxxxxx> > Cc: David Rientjes <rientjes@xxxxxxxxxx> > Cc: Dan Williams <dan.j.williams@xxxxxxxxx> > Cc: David Hildenbrand <david@xxxxxxxxxx> > Cc: Greg Thelen <gthelen@xxxxxxxxxx> > Cc: Oscar Salvador <osalvador@xxxxxxx> > Cc: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > --- > mm/vmscan.c | 34 ++++++++++++++++++++++++++++++---- > 1 file changed, 30 insertions(+), 4 deletions(-) LGTM. Reviewed-by: Zi Yan <ziy@xxxxxxxxxx> — Best Regards, Yan, Zi
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