[merged mm-stable] mm-multi-gen-lru-simplify-arch_has_hw_pte_young-check.patch removed from -mm tree

[merged mm-stable] mm-multi-gen-lru-simplify-arch_has_hw_pte_young-check.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: multi-gen LRU: simplify arch_has_hw_pte_young() check
has been removed from the -mm tree.  Its filename was
     mm-multi-gen-lru-simplify-arch_has_hw_pte_young-check.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Yu Zhao <yuzhao@google.com>
Subject: mm: multi-gen LRU: simplify arch_has_hw_pte_young() check
Date: Wed, 21 Dec 2022 21:19:06 -0700

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
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>
---

 mm/vmscan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/vmscan.c~mm-multi-gen-lru-simplify-arch_has_hw_pte_young-check
+++ a/mm/vmscan.c
@@ -4428,7 +4428,7 @@ static bool try_to_inc_max_seq(struct lr
 	 * 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;
 	}
_

Patches currently in -mm which might be from yuzhao@google.com are

mm-multi-gen-lru-fix-crash-during-cgroup-migration.patch