39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
From 25887d48dff860751a06caa4188bfaf6bfb6e4b2 Mon Sep 17 00:00:00 2001
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From: Yu Zhao <yuzhao@google.com>
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Date: Wed, 21 Dec 2022 21:19:06 -0700
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Subject: [PATCH 08/19] UPSTREAM: mm: multi-gen LRU: simplify
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arch_has_hw_pte_young() check
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Scanning page tables when hardware does not set the accessed bit has
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no real use cases.
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Link: https://lkml.kernel.org/r/20221222041905.2431096-9-yuzhao@google.com
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Signed-off-by: Yu Zhao <yuzhao@google.com>
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Cc: Johannes Weiner <hannes@cmpxchg.org>
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Cc: Jonathan Corbet <corbet@lwn.net>
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Cc: Michael Larabel <Michael@MichaelLarabel.com>
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Cc: Michal Hocko <mhocko@kernel.org>
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Cc: Mike Rapoport <rppt@kernel.org>
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Cc: Roman Gushchin <roman.gushchin@linux.dev>
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Cc: Suren Baghdasaryan <surenb@google.com>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Bug: 274865848
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(cherry picked from commit f386e9314025ea99dae639ed2032560a92081430)
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Change-Id: I84d97ab665b4e3bb862a9bc7d72f50dea7191a6b
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Signed-off-by: T.J. Mercier <tjmercier@google.com>
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---
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mm/vmscan.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/mm/vmscan.c
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+++ b/mm/vmscan.c
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@@ -4417,7 +4417,7 @@ static bool try_to_inc_max_seq(struct lr
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* handful of PTEs. Spreading the work out over a period of time usually
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* is less efficient, but it avoids bursty page faults.
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*/
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- if (!force_scan && !(arch_has_hw_pte_young() && get_cap(LRU_GEN_MM_WALK))) {
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+ if (!arch_has_hw_pte_young() || !get_cap(LRU_GEN_MM_WALK)) {
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success = iterate_mm_list_nowalk(lruvec, max_seq);
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goto done;
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}
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