Commit f386e931 authored by Yu Zhao's avatar Yu Zhao Committed by Andrew Morton
Browse files

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.

Link: https://lkml.kernel.org/r/20221222041905.2431096-9-yuzhao@google.com


Signed-off-by: default avatarYu 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent e9d4e1ee

mm/vmscan.c

+1 −1
Original line number Diff line number Diff line
@@ -4428,7 +4428,7 @@ 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;

	}