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mm: migrate: Add a tracepoint for migrate_pages

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The pgmigrate_success and pgmigrate_fail vmstat counters tells the user
about migration activity but not the type or the reason. This patch adds
a tracepoint to identify the type of page migration and why the page is
being migrated.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
This commit is contained in:
Mel Gorman
2012-10-19 14:07:31 +01:00
parent 5647bc293a
commit 7b2a2d4a18
8 changed files with 82 additions and 10 deletions
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3
mm/compaction.c
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@@ -990,7 +990,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
nr_migrate = cc->nr_migratepages;
err = migrate_pages(&cc->migratepages, compaction_alloc,
(unsigned long)cc, false,
cc->sync ? MIGRATE_SYNC_LIGHT : MIGRATE_ASYNC);
cc->sync ? MIGRATE_SYNC_LIGHT : MIGRATE_ASYNC,
MR_COMPACTION);
update_nr_listpages(cc);
nr_remaining = cc->nr_migratepages;