hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVN0
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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 d5d271d899a4..2a86507aa7f7 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5116,6 +5116,36 @@ static int memcg_events_local_show(struct seq_file *m, void *v) __memcg_events_show(m, memcg->memory_events_local); 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; +} #endif
static struct cftype mem_cgroup_legacy_files[] = { @@ -5275,6 +5305,12 @@ 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, + }, #endif { }, /* terminate */ };