Re: [PATCH OLK-6.6 7/8] memcg: export high_async_ratio to userland

这个也跟上个补丁合成一个

按照功能合成一个

On 2023/12/2 12:12, Lu Jialin wrote:

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVN0

---

User can set high_async_ratio from 10 to 100; start memcg high async when memcg_usage is larger than memory.high * high_async_ratio / 100;

Signed-off-by: Lu Jialin lujialin4@huawei.com

mm/memcontrol.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c index bf225648fcb4..5a808d88e27a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5196,6 +5196,35 @@ static int memcg_events_local_show(struct seq_file *m, void *v) return 0; }

+static int memcg_high_async_ratio_show(struct seq_file *m, void *v) +{

• seq_printf(m, "%d\n",

•    READ_ONCE(mem_cgroup_from_seq(m)->high_async_ratio));
  

• return 0;

+}

+static ssize_t memcg_high_async_ratio_write(struct kernfs_open_file *of,

• 			    char *buf, size_t nbytes, loff_t off)
  

+{

• struct mem_cgroup *memcg = mem_cgroup_from_css(of_css(of));
• int ret, high_async_ratio;
• buf = strstrip(buf);
• if (!buf)

• return -EINVAL;
  

• ret = kstrtoint(buf, 0, &high_async_ratio);
• if (ret)

• return ret;
  

• if (high_async_ratio > HIGH_ASYNC_RATIO_BASE ||

•    high_async_ratio <= HIGH_ASYNC_RATIO_GAP)
  

• return -EINVAL;
  

• WRITE_ONCE(memcg->high_async_ratio, high_async_ratio);
• return nbytes;

+}

static int memory_stat_show(struct seq_file *m, void *v);

@@ -5355,6 +5384,13 @@ static struct cftype mem_cgroup_legacy_files[] = { .file_offset = offsetof(struct mem_cgroup, events_local_file), .seq_show = memcg_events_local_show, },

• {

• .name = "high_async_ratio",
  

• .flags = CFTYPE_NOT_ON_ROOT,
  

• .seq_show = memcg_high_async_ratio_show,
  

• .write = memcg_high_async_ratio_write,
  

• },
• { }, /* terminate */ };