Messages in this thread | | | Date | Tue, 28 May 2019 11:51:34 -0400 | From | Johannes Weiner <> | Subject | Re: [PATCH REBASED 1/4] mm: Move recent_rotated pages calculation to shrink_inactive_list() |
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On Mon, Mar 18, 2019 at 12:27:59PM +0300, Kirill Tkhai wrote: > @@ -1945,6 +1942,8 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, > count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_DIRECT, > nr_reclaimed); > } > + reclaim_stat->recent_rotated[0] = stat.nr_activate[0]; > + reclaim_stat->recent_rotated[1] = stat.nr_activate[1];
Surely this should be +=, right?
Otherwise we maintain essentially no history of page rotations and that wreaks havoc on the page cache vs. swapping reclaim balance.
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