[PATCH mm-unstable v15 09/14] mm: multi-gen LRU: optimize multiple memcgs

[Yu Zhao]

Hi Andrew,

Can you please take this fixlet? Thanks.

Fix imprecise comments.

Signed-off-by: Yu Zhao <yuzhao at google.com>
---
 mm/vmscan.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index a8fd6300fa7e..5b565470286b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -5078,7 +5078,7 @@ static bool should_abort_scan(struct lruvec *lruvec, unsigned long seq,
 	DEFINE_MAX_SEQ(lruvec);
 
 	if (!current_is_kswapd()) {
-		/* age each memcg once to ensure fairness */
+		/* age each memcg at most once to ensure fairness */
 		if (max_seq - seq > 1)
 			return true;
 
@@ -5103,10 +5103,9 @@ static bool should_abort_scan(struct lruvec *lruvec, unsigned long seq,
 
 	/*
 	 * A minimum amount of work was done under global memory pressure. For
-	 * kswapd, it may be overshooting. For direct reclaim, the target isn't
-	 * met, and yet the allocation may still succeed, since kswapd may have
-	 * caught up. In either case, it's better to stop now, and restart if
-	 * necessary.
+	 * kswapd, it may be overshooting. For direct reclaim, the allocation
+	 * may succeed if all suitable zones are somewhat safe. In either case,
+	 * it's better to stop now, and restart later if necessary.
 	 */
 	for (i = 0; i <= sc->reclaim_idx; i++) {
 		unsigned long wmark;
-- 
2.37.3.998.g577e59143f-goog