git.openwrt.org Git - openwrt/staging/jow.git/blob

   1 From bec433f29537652ed054148edfd7e2183ddcf7c3 Mon Sep 17 00:00:00 2001
   2 From: "T.J. Alumbaugh" <talumbau@google.com>
   3 Date: Wed, 18 Jan 2023 00:18:25 +0000
   4 Subject: [PATCH 16/19] UPSTREAM: mm: multi-gen LRU: improve
   5  lru_gen_exit_memcg()
   6
   7 Add warnings and poison ->next.
   8
   9 Link: https://lkml.kernel.org/r/20230118001827.1040870-6-talumbau@google.com
  10 Change-Id: I53de9e04c1ae941e122b33cd45d2bbb5f34aae0c
  11 Signed-off-by: T.J. Alumbaugh <talumbau@google.com>
  12 Cc: Yu Zhao <yuzhao@google.com>
  13 Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
  14 (cherry picked from commit 37cc99979d04cca677c0ad5c0acd1149ec165d1b)
  15 Bug: 274865848
  16 Signed-off-by: T.J. Mercier <tjmercier@google.com>
  17 ---
  18  mm/vmscan.c | 5 +++++
  19  1 file changed, 5 insertions(+)
  20
  21 diff --git a/mm/vmscan.c b/mm/vmscan.c
  22 index ccde215c084ca..d5d6f8d94f58a 100644
  23 --- a/mm/vmscan.c
  24 +++ b/mm/vmscan.c
  25 @@ -6160,12 +6160,17 @@ void lru_gen_exit_memcg(struct mem_cgroup *memcg)
  26         int i;
  27         int nid;
  28
  29 +       VM_WARN_ON_ONCE(!list_empty(&memcg->mm_list.fifo));
  30 +
  31         for_each_node(nid) {
  32                 struct lruvec *lruvec = get_lruvec(memcg, nid);
  33
  34 +               VM_WARN_ON_ONCE(lruvec->mm_state.nr_walkers);
  35                 VM_WARN_ON_ONCE(memchr_inv(lruvec->lrugen.nr_pages, 0,
  36                                            sizeof(lruvec->lrugen.nr_pages)));
  37
  38 +               lruvec->lrugen.list.next = LIST_POISON1;
  39 +
  40                 for (i = 0; i < NR_BLOOM_FILTERS; i++) {
  41                         bitmap_free(lruvec->mm_state.filters[i]);
  42                         lruvec->mm_state.filters[i] = NULL;
  43 --
  44 2.40.1
  45