Messages in this thread | | | Date | Wed, 21 Sep 2022 10:13:03 +0100 | From | Mel Gorman <> | Subject | Re: [PATCH] mm/vmscan: don't scan adjust too much if current is not kswapd |
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On Tue, Sep 20, 2022 at 10:23:05AM +0800, Hongchen Zhang wrote: > Hi Mel, > > The scan adjust algorithm was originally introduced by you from > commmit e82e0561dae9 ("mm: vmscan: obey proportional scanning requirements > for kswapd"), any suggestion about this fix patch? > In short, proportional scanning is not friendly to processes other than > kswapd. >
I suspect that 6eb90d649537 ("mm: vmscan: fix extreme overreclaim and swap floods") is a more appropriate fix. While it also has a fairness impact, it's a more general approach that is likely more robust and while fairness is important, completely thrashing a full LRU is neither fair nor expected.
-- Mel Gorman SUSE Labs
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