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Commit 7548341b authored by Mel Gorman's avatar Mel Gorman
Browse files

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: default avatarMel Gorman <mgorman@suse.de>
parent 220018d3

mm/migrate.c

+4 −1
Original line number Diff line number Diff line
@@ -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;

	}