mm: memcontrol: report kernel stack usage in cgroup2 memory.stat

Show how much memory is allocated to kernel stacks.

Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3ad64bf464fd..4b7dda7c2e74 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5106,6 +5106,8 @@ static int memory_stat_show(struct seq_file *m, void *v)
                    (u64)stat[MEM_CGROUP_STAT_RSS] * PAGE_SIZE);
         seq_printf(m, "file %llu\n",
                    (u64)stat[MEM_CGROUP_STAT_CACHE] * PAGE_SIZE);
+        seq_printf(m, "kernel_stack %llu\n",
+                   (u64)stat[MEMCG_KERNEL_STACK] * PAGE_SIZE);
         seq_printf(m, "slab %llu\n",
                    (u64)(stat[MEMCG_SLAB_RECLAIMABLE] +
                          stat[MEMCG_SLAB_UNRECLAIMABLE]) * PAGE_SIZE);