Commit 37cc9997 authored by T.J. Alumbaugh's avatar T.J. Alumbaugh Committed by Andrew Morton
Browse files

mm: multi-gen LRU: improve lru_gen_exit_memcg() 

Add warnings and poison ->next.

Link: https://lkml.kernel.org/r/20230118001827.1040870-6-talumbau@google.com


Signed-off-by: default avatarT.J. Alumbaugh <talumbau@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 36c7b4db

mm/vmscan.c

+5 −0
Original line number Diff line number Diff line
@@ -6168,12 +6168,17 @@ void lru_gen_exit_memcg(struct mem_cgroup *memcg) 
	int i;

	int nid;



	VM_WARN_ON_ONCE(!list_empty(&memcg->mm_list.fifo));



	for_each_node(nid) {

		struct lruvec *lruvec = get_lruvec(memcg, nid);



		VM_WARN_ON_ONCE(lruvec->mm_state.nr_walkers);

		VM_WARN_ON_ONCE(memchr_inv(lruvec->lrugen.nr_pages, 0,

					   sizeof(lruvec->lrugen.nr_pages)));



		lruvec->lrugen.list.next = LIST_POISON1;



		for (i = 0; i < NR_BLOOM_FILTERS; i++) {

			bitmap_free(lruvec->mm_state.filters[i]);

			lruvec->mm_state.filters[i] = NULL;