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

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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>
This commit is contained in:
Vladimir Davydov 2016-03-17 14:17:38 -07:00 • committed by Linus Torvalds
parent 27ee57c93f
commit 12580e4b54
4 changed files with 17 additions and 2 deletions
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10
kernel/fork.c
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@ -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;