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mm/vmscan: make sure wakeup_kswapd with managed zone
wakeup_kswapd() only wake up kswapd when the zone is managed. For two callers of wakeup_kswapd(), they are node perspective. * wake_all_kswapds * numamigrate_isolate_page If we picked up a !managed zone, this is not we expected. This patch makes sure we pick up a managed zone for wakeup_kswapd(). And it also use managed_zone in migrate_balanced_pgdat() to get the proper zone. [richard.weiyang@gmail.com: adjust the usage in migrate_balanced_pgdat()] Link: https://lkml.kernel.org/r/20220329010901.1654-2-richard.weiyang@gmail.com Link: https://lkml.kernel.org/r/20220327024101.10378-2-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Oscar Salvador <osalvador@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -1969,7 +1969,7 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
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#ifdef CONFIG_NUMA_BALANCING
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/*
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* Returns true if this is a safe migration target node for misplaced NUMA
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* pages. Currently it only checks the watermarks which crude
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* pages. Currently it only checks the watermarks which is crude.
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*/
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static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
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unsigned long nr_migrate_pages)
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@ -1979,7 +1979,7 @@ static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
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for (z = pgdat->nr_zones - 1; z >= 0; z--) {
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struct zone *zone = pgdat->node_zones + z;
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if (!populated_zone(zone))
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if (!managed_zone(zone))
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continue;
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/* Avoid waking kswapd by allocating pages_to_migrate pages. */
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@ -2032,7 +2032,7 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
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if (!(sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING))
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return 0;
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for (z = pgdat->nr_zones - 1; z >= 0; z--) {
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if (populated_zone(pgdat->node_zones + z))
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if (managed_zone(pgdat->node_zones + z))
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break;
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}
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wakeup_kswapd(pgdat->node_zones + z, 0, order, ZONE_MOVABLE);
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@ -4629,6 +4629,8 @@ static void wake_all_kswapds(unsigned int order, gfp_t gfp_mask,
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for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, highest_zoneidx,
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ac->nodemask) {
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if (!managed_zone(zone))
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continue;
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if (last_pgdat != zone->zone_pgdat)
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wakeup_kswapd(zone, gfp_mask, order, highest_zoneidx);
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last_pgdat = zone->zone_pgdat;
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