Messages in this thread | | | From | "Hillf Danton" <> | Subject | Re: [PATCH 5/9] mm: don't avoid high-priority reclaim on unreclaimable nodes | Date | Thu, 02 Mar 2017 11:31:01 +0800 |
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On March 01, 2017 5:40 AM Johannes Weiner wrote: > > 246e87a93934 ("memcg: fix get_scan_count() for small targets") sought > to avoid high reclaim priorities for kswapd by forcing it to scan a > minimum amount of pages when lru_pages >> priority yielded nothing. > > b95a2f2d486d ("mm: vmscan: convert global reclaim to per-memcg LRU > lists"), due to switching global reclaim to a round-robin scheme over > all cgroups, had to restrict this forceful behavior to unreclaimable > zones in order to prevent massive overreclaim with many cgroups. > > The latter patch effectively neutered the behavior completely for all > but extreme memory pressure. But in those situations we might as well > drop the reclaimers to lower priority levels. Remove the check. > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> > --- > mm/vmscan.c | 19 +++++-------------- > 1 file changed, 5 insertions(+), 14 deletions(-) > Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
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