From 7548341b28956ccd35a63ab12f01d8541041aa70 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Tue, 27 Nov 2012 10:31:44 +0000 Subject: [PATCH] mm: numa: Account for failed allocations and isolations as migration failures Subject says it all. Allocation failures and a failure to isolate should be accounted as a migration failure. This is partially another difference between base page and transhuge page migration. A base page migration makes multiple attempts for these conditions before it would be accounted for as a failure. Signed-off-by: Mel Gorman --- mm/migrate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index 9341a501d168..26537c4f3094 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1635,12 +1635,15 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, new_page = alloc_pages_node(node, (GFP_TRANSHUGE | GFP_THISNODE) & ~__GFP_WAIT, HPAGE_PMD_ORDER); - if (!new_page) + if (!new_page) { + count_vm_events(PGMIGRATE_FAIL, HPAGE_PMD_NR); goto out_dropref; + } page_xchg_last_nid(new_page, page_last_nid(page)); isolated = numamigrate_isolate_page(pgdat, page); if (!isolated) { + count_vm_events(PGMIGRATE_FAIL, HPAGE_PMD_NR); put_page(new_page); goto out_keep_locked; } -- 2.30.2