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mm: migrate: Account a transhuge page properly when rate limiting

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If there is excessive migration due to NUMA balancing it gets rate
limited. It does this by counting the number of pages it has migrated
recently but counts a transhuge page as 1 page. Account for it properly.

Signed-off-by: Mel Gorman <mgorman@suse.de>
This commit is contained in:
Mel Gorman 2012-11-29 09:24:36 +00:00
parent 7548341b28
commit d28d433512
1 changed files with 4 additions and 4 deletions
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8
mm/migrate.c
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@ -1492,7 +1492,7 @@ bool migrate_ratelimited(int node)
}
/* Returns true if the node is migrate rate-limited after the update */
bool numamigrate_update_ratelimit(pg_data_t *pgdat)
bool numamigrate_update_ratelimit(pg_data_t *pgdat, unsigned long nr_pages)
{
bool rate_limited = false;
@ -1510,7 +1510,7 @@ bool numamigrate_update_ratelimit(pg_data_t *pgdat)
if (pgdat->numabalancing_migrate_nr_pages > ratelimit_pages)
rate_limited = true;
else
pgdat->numabalancing_migrate_nr_pages++;
pgdat->numabalancing_migrate_nr_pages += nr_pages;
spin_unlock(&pgdat->numabalancing_migrate_lock);
return rate_limited;
@ -1579,7 +1579,7 @@ int migrate_misplaced_page(struct page *page, int node)
* Optimal placement is no good if the memory bus is saturated and
* all the time is being spent migrating!
*/
if (numamigrate_update_ratelimit(pgdat)) {
if (numamigrate_update_ratelimit(pgdat, 1)) {
put_page(page);
goto out;
}
@ -1630,7 +1630,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
* Optimal placement is no good if the memory bus is saturated and
* all the time is being spent migrating!
*/
if (numamigrate_update_ratelimit(pgdat))
if (numamigrate_update_ratelimit(pgdat, HPAGE_PMD_NR))
goto out_dropref;
new_page = alloc_pages_node(node,