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mm/mglru: don't sync disk for each aging cycle

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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: bd74fdaea1 ("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>
This commit is contained in:
Yu Zhao 2022-09-28 13:36:58 -06:00 committed by Andrew Morton
parent e55b9f9686
commit 14aa8b2d5c
1 changed files with 0 additions and 2 deletions
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mm/vmscan.c
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@ -4413,8 +4413,6 @@ static bool try_to_inc_max_seq(struct lruvec *lruvec, unsigned long max_seq,
if (wq_has_sleeper(&lruvec->mm_state.wait)) if (wq_has_sleeper(&lruvec->mm_state.wait))
wake_up_all(&lruvec->mm_state.wait); wake_up_all(&lruvec->mm_state.wait);
wakeup_flusher_threads(WB_REASON_VMSCAN);
return true; return true;
} }