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UPSTREAM: mm: multi-gen LRU: simplify arch_has_hw_pte_young() check

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Scanning page tables when hardware does not set the accessed bit has
no real use cases.

Link: https://lkml.kernel.org/r/20221222041905.2431096-9-yuzhao@google.com
Change-Id: If6c1232a5d5f8f7e3ce3e076f7e865c18ee2a6c0
Signed-off-by: Yu Zhao <yuzhao@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michael Larabel <Michael@MichaelLarabel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit f386e93140)
Bug: 274865848
Signed-off-by: T.J. Mercier <tjmercier@google.com>
This commit is contained in:
Yu Zhao
2022-12-21 21:19:06 -07:00
committed by T.J. Mercier
parent 4c26a5c7ca
commit 18580efd2f
1 changed files with 1 additions and 1 deletions
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2
mm/vmscan.c
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@@ -4193,7 +4193,7 @@ 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;
}