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Message-Id: <20221201223923.873696-9-yuzhao@google.com>
Date: Thu, 1 Dec 2022 15:39:24 -0700
From: Yu Zhao <yuzhao@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Johannes Weiner <hannes@...xchg.org>,
Jonathan Corbet <corbet@....net>,
Michael Larabel <Michael@...haellarabel.com>,
Michal Hocko <mhocko@...nel.org>,
Mike Rapoport <rppt@...nel.org>,
Roman Gushchin <roman.gushchin@...ux.dev>,
Suren Baghdasaryan <surenb@...gle.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, linux-mm@...gle.com,
Yu Zhao <yuzhao@...gle.com>
Subject: [PATCH mm-unstable v1 8/8] mm: multi-gen LRU: simplify
arch_has_hw_pte_young() check
Scanning page tables when hardware does not set the accessed bit has
no real use cases.
Signed-off-by: Yu Zhao <yuzhao@...gle.com>
---
mm/vmscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 39724e7ae837..5994592c55fd 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4412,7 +4412,7 @@ static bool try_to_inc_max_seq(struct lruvec *lruvec, unsigned long max_seq,
* handful of PTEs. Spreading the work out over a period of time usually
* is less efficient, but it avoids bursty page faults.
*/
- if (!force_scan && !(arch_has_hw_pte_young() && get_cap(LRU_GEN_MM_WALK))) {
+ if (!arch_has_hw_pte_young() || !get_cap(LRU_GEN_MM_WALK)) {
success = iterate_mm_list_nowalk(lruvec, max_seq);
goto done;
}
--
2.39.0.rc0.267.gcb52ba06e7-goog
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