From 92d430e8955c976eacb7cc91d7ff849c0dd009af Mon Sep 17 00:00:00 2001 From: Yu Zhao Date: Wed, 28 Sep 2022 13:36:58 -0600 Subject: [PATCH 13/29] 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 Reported-by: Axel Rasmussen Signed-off-by: Andrew Morton --- mm/vmscan.c | 2 -- 1 file changed, 2 deletions(-) --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4165,8 +4165,6 @@ done: if (wq_has_sleeper(&lruvec->mm_state.wait)) wake_up_all(&lruvec->mm_state.wait); - wakeup_flusher_threads(WB_REASON_VMSCAN); - return true; }