The patch titled
Subject: mm: memcontrol: report kernel stack usage in cgroup2 memory.stat
has been added to the -mm tree. Its filename is
mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/cgroup-v2.txt | 4 ++++
include/linux/memcontrol.h | 1 +
kernel/fork.c | 10 +++++++++-
mm/memcontrol.c | 2 ++
4 files changed, 16 insertions(+), 1 deletion(-)
diff -puN Documentation/cgroup-v2.txt~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat Documentation/cgroup-v2.txt
--- a/Documentation/cgroup-v2.txt~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat
+++ a/Documentation/cgroup-v2.txt
@@ -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
diff -puN include/linux/memcontrol.h~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat
+++ a/include/linux/memcontrol.h
@@ -55,6 +55,7 @@ enum mem_cgroup_stat_index {
MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS,
MEMCG_SLAB_RECLAIMABLE,
MEMCG_SLAB_UNRECLAIMABLE,
+ MEMCG_KERNEL_STACK,
MEMCG_NR_STAT,
};
diff -puN kernel/fork.c~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat kernel/fork.c
--- a/kernel/fork.c~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat
+++ a/kernel/fork.c
@@ -164,12 +164,20 @@ static struct thread_info *alloc_thread_
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;
diff -puN mm/memcontrol.c~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat
+++ a/mm/memcontrol.c
@@ -5100,6 +5100,8 @@ static int memory_stat_show(struct seq_f
(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);
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
mm-vmscan-do-not-clear-shrinker_numa_aware-if-nr_node_ids-==-1.patch
mm-migrate-do-not-touch-page-mem_cgroup-of-live-pages-fix-2.patch
mm-memcontrol-do-not-bypass-slab-charge-if-memcg-is-offline.patch
mm-memcontrol-make-tree_statevents-fetch-all-stats.patch
mm-memcontrol-report-slab-usage-in-cgroup2-memorystat.patch
mm-memcontrol-report-kernel-stack-usage-in-cgroup2-memorystat.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
