mm: migrate: Add a tracepoint for migrate_pages

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>

1 files changed, 2 insertions, 1 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7bb35ac0964..5953dc2d196 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5707,7 +5707,8 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
 
                 ret = migrate_pages(&cc->migratepages,
                                     alloc_migrate_target,
-                                    0, false, MIGRATE_SYNC);
+                                    0, false, MIGRATE_SYNC,
+                                    MR_CMA);
         }
 
         putback_lru_pages(&cc->migratepages);