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authorMel Gorman <mgorman@suse.de>2012-11-29 09:24:36 +0000
committerMel Gorman <mgorman@suse.de>2012-12-11 14:42:59 +0000
commitd28d433512f4f387e2563c14db45a7bb8a338b1a (patch)
tree0f56298e745df6c08a5b5aa202da7ca2f5d00ab6 /mm/migrate.c
parent7548341b28956ccd35a63ab12f01d8541041aa70 (diff)
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mm: migrate: Account a transhuge page properly when rate limiting
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>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 26537c4f3094..f24e9cc49cc4 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -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,