Commit dfef2ef4 authored by David Rientjes's avatar David Rientjes Committed by Linus Torvalds

mm, migrate: increment fail count on ENOMEM

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

Link: default avatarDavid Rientjes <>
Cc: Vlastimil Babka <>
Cc: Mel Gorman <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 6cd9dc3e
......@@ -1171,6 +1171,7 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
switch(rc) {
case -ENOMEM:
goto out;
case -EAGAIN:
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