Commit 12580e4b authored by Vladimir Davydov's avatar Vladimir Davydov Committed by Linus Torvalds

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

Show how much memory is allocated to kernel stacks.
Signed-off-by: default avatarVladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 27ee57c9
......@@ -843,6 +843,10 @@ PAGE_SIZE multiple when read back.
Amount of memory used to cache filesystem data,
including tmpfs and shared memory.
kernel_stack
Amount of memory allocated to kernel stacks.
slab
Amount of memory used for storing in-kernel data
......
......@@ -52,9 +52,10 @@ enum mem_cgroup_stat_index {
MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
MEM_CGROUP_STAT_NSTATS,
/* default hierarchy stats */
MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS,
MEMCG_KERNEL_STACK = MEM_CGROUP_STAT_NSTATS,
MEMCG_SLAB_RECLAIMABLE,
MEMCG_SLAB_UNRECLAIMABLE,
MEMCG_SOCK,
MEMCG_NR_STAT,
};
......
......@@ -164,12 +164,20 @@ static struct thread_info *alloc_thread_info_node(struct task_struct *tsk,
struct page *page = alloc_kmem_pages_node(node, THREADINFO_GFP,
THREAD_SIZE_ORDER);
if (page)
memcg_kmem_update_page_stat(page, MEMCG_KERNEL_STACK,
1 << THREAD_SIZE_ORDER);
return page ? page_address(page) : NULL;
}
static inline void free_thread_info(struct thread_info *ti)
{
free_kmem_pages((unsigned long)ti, THREAD_SIZE_ORDER);
struct page *page = virt_to_page(ti);
memcg_kmem_update_page_stat(page, MEMCG_KERNEL_STACK,
-(1 << THREAD_SIZE_ORDER));
__free_kmem_pages(page, THREAD_SIZE_ORDER);
}
# else
static struct kmem_cache *thread_info_cache;
......
......@@ -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);
......
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