Commit 16b3be40 authored Jan 25, 2023 by Mel Gorman Committed by Andrew Morton Feb 02, 2023

mm, compaction: check if a page has been captured before draining PCP pages

If a page has been captured then draining is unnecssary so check first for
a captured page.

Link: https://lkml.kernel.org/r/20230125134434.18017-3-mgorman@techsingularity.net


Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Chuyi Zhou <zhouchuyi@bytedance.com>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 48731c84

mm/compaction.c

+6 −6

Original line number	Diff line number	Diff line
		@@ -2439,6 +2439,12 @@ compact_zone(struct compact_control cc, struct capture_control capc)
		}
		}

		/* Stop if a page has been captured */
		if (capc && capc->page) {
		ret = COMPACT_SUCCESS;
		break;
		}

		check_drain:
		/*
		* Has the migration scanner moved away from the previous
		@@ -2457,12 +2463,6 @@ compact_zone(struct compact_control cc, struct capture_control capc)
		last_migrated_pfn = 0;
		}
		}

		/* Stop if a page has been captured */
		if (capc && capc->page) {
		ret = COMPACT_SUCCESS;
		break;
		}
		}

		out: