Messages in this thread Patch in this message | | | Date | Thu, 19 May 2016 15:11:23 -0700 (PDT) | From | David Rientjes <> | Subject | [patch] mm, migrate: increment fail count on ENOMEM |
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If page migration fails due to -ENOMEM, nr_failed should still be incremented for proper statistics.
This was encountered recently when all page migration vmstats showed 0, and inferred that migrate_pages() was never called, although in reality the first page migration failed because compaction_alloc() failed to find a migration target.
This patch increments nr_failed so the vmstat is properly accounted on ENOMEM.
Signed-off-by: David Rientjes <rientjes@google.com> --- mm/migrate.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/mm/migrate.c b/mm/migrate.c --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1171,6 +1171,7 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page, switch(rc) { case -ENOMEM: + nr_failed++; goto out; case -EAGAIN: retry++;
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