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From 14aa8b2d5c2ebead01b542f62d68029023054774 Mon Sep 17 00:00:00 2001
From: Yu Zhao <yuzhao@google.com>
Date: Wed, 28 Sep 2022 13:36:58 -0600
Subject: [PATCH 1/1] mm/mglru: don't sync disk for each aging cycle
wakeup_flusher_threads() was added under the assumption that if a system
runs out of clean cold pages, it might want to write back dirty pages more
aggressively so that they can become clean and be dropped.
However, doing so can breach the rate limit a system wants to impose on
writeback, resulting in early SSD wearout.
Link: https://lkml.kernel.org/r/YzSiWq9UEER5LKup@google.com
Fixes: bd74fdaea146 ("mm: multi-gen LRU: support page table walks")
Signed-off-by: Yu Zhao <yuzhao@google.com>
Reported-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/vmscan.c | 2 --
1 file changed, 2 deletions(-)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4007,8 +4007,6 @@ static bool try_to_inc_max_seq(struct lr
if (wq_has_sleeper(&lruvec->mm_walk.wait))
wake_up_all(&lruvec->mm_walk.wait);
- wakeup_flusher_threads(WB_REASON_VMSCAN);
-
return true;
}
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