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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 <mgorman@suse.de>
This commit is contained in:
Mel Gorman 2012-11-27 10:31:44 +00:00
parent 220018d388
commit 7548341b28
1 changed files with 4 additions and 1 deletions
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5
mm/migrate.c
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@ -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;
}