| Message ID | 20211022144651.19914-8-mgorman@techsingularity.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Remove dependency on congestion_wait in mm/ | expand |
diff --git a/mm/vmscan.c b/mm/vmscan.c index 66da45084af4..35b6ccaa01c3 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1042,7 +1042,7 @@ void reclaim_throttle(pg_data_t *pgdat, enum vmscan_throttle_state reason) break; case VMSCAN_THROTTLE_NOPROGRESS: - timeout = HZ/10; + timeout = HZ/2; break; case VMSCAN_THROTTLE_ISOLATED: timeout = HZ/50;
Tracing of the stutterp workload showed the following delays 1 usect_delayed=124000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=128000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=176000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=536000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=544000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=556000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=624000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=716000 reason=VMSCAN_THROTTLE_NOPROGRESS 1 usect_delayed=772000 reason=VMSCAN_THROTTLE_NOPROGRESS 2 usect_delayed=512000 reason=VMSCAN_THROTTLE_NOPROGRESS 16 usect_delayed=120000 reason=VMSCAN_THROTTLE_NOPROGRESS 53 usect_delayed=116000 reason=VMSCAN_THROTTLE_NOPROGRESS 116 usect_delayed=112000 reason=VMSCAN_THROTTLE_NOPROGRESS 5907 usect_delayed=108000 reason=VMSCAN_THROTTLE_NOPROGRESS 71741 usect_delayed=104000 reason=VMSCAN_THROTTLE_NOPROGRESS All the throttling hit the full timeout and then there was wakeup delays meaning that the wakeups are premature as no other reclaimer such as kswapd has made progress. This patch increases the maximum timeout. Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)