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mm/memcontrol: update lruvec counters in mem_cgroup_move_account 

Mapped, dirty and writeback pages are also counted in per-lruvec stats.
These counters needs update when page is moved between cgroups.

Currently is nobody *consuming* the lruvec versions of these counters and
that there is no user-visible effect.

Link: http://lkml.kernel.org/r/157112699975.7360.1062614888388489788.stgit@buzz
Fixes: 00f3ca2c2d ("mm: memcontrol: per-lruvec stats infrastructure")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
alistair/sunxi64-5.4-dsi
Konstantin Khlebnikov 2019-10-18 20:20:11 -07:00 committed by Linus Torvalds
parent b918c43021
commit ae8af4388d
1 changed files with 12 additions and 6 deletions
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18
mm/memcontrol.c
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@ -5420,6 +5420,8 @@ static int mem_cgroup_move_account(struct page *page,
struct mem_cgroup *from,
struct mem_cgroup *to)
{
struct lruvec *from_vec, *to_vec;
struct pglist_data *pgdat;
unsigned long flags;
unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;
int ret;
@ -5443,11 +5445,15 @@ static int mem_cgroup_move_account(struct page *page,
anon = PageAnon(page);
pgdat = page_pgdat(page);
from_vec = mem_cgroup_lruvec(pgdat, from);
to_vec = mem_cgroup_lruvec(pgdat, to);
spin_lock_irqsave(&from->move_lock, flags);
if (!anon && page_mapped(page)) {
__mod_memcg_state(from, NR_FILE_MAPPED, -nr_pages);
__mod_memcg_state(to, NR_FILE_MAPPED, nr_pages);
__mod_lruvec_state(from_vec, NR_FILE_MAPPED, -nr_pages);
__mod_lruvec_state(to_vec, NR_FILE_MAPPED, nr_pages);
}
/*
@ -5459,14 +5465,14 @@ static int mem_cgroup_move_account(struct page *page,
struct address_space *mapping = page_mapping(page);
if (mapping_cap_account_dirty(mapping)) {
__mod_memcg_state(from, NR_FILE_DIRTY, -nr_pages);
__mod_memcg_state(to, NR_FILE_DIRTY, nr_pages);
__mod_lruvec_state(from_vec, NR_FILE_DIRTY, -nr_pages);
__mod_lruvec_state(to_vec, NR_FILE_DIRTY, nr_pages);
}
}
if (PageWriteback(page)) {
__mod_memcg_state(from, NR_WRITEBACK, -nr_pages);
__mod_memcg_state(to, NR_WRITEBACK, nr_pages);
__mod_lruvec_state(from_vec, NR_WRITEBACK, -nr_pages);
__mod_lruvec_state(to_vec, NR_WRITEBACK, nr_pages);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE