hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8JVN0
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Export memory.high from cgroupv2 to cgroupv1. Therefore, when the usage of the memcg is larger than memory.high, some pages will be reclaimed before return to userland, which will throttle the process.
Only export memory.high number in mem_cgroup_legacy_files and move related functions in front of mem_cgroup_legacy_files. There is no need to other changes.
Signed-off-by: Lu Jialin lujialin4@huawei.com --- mm/memcontrol.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 52b5d39ea546..546c28719950 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5019,6 +5019,9 @@ static ssize_t memory_min_write(struct kernfs_open_file *of, static int memory_low_show(struct seq_file *m, void *v); static ssize_t memory_low_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off); +static int memory_high_show(struct seq_file *m, void *v); +static ssize_t memory_high_write(struct kernfs_open_file *of, + char *buf, size_t nbytes, loff_t off); #endif
static struct cftype mem_cgroup_legacy_files[] = { @@ -5160,6 +5163,12 @@ static struct cftype mem_cgroup_legacy_files[] = { .seq_show = memory_low_show, .write = memory_low_write, }, + { + .name = "high", + .flags = CFTYPE_NOT_ON_ROOT, + .seq_show = memory_high_show, + .write = memory_high_write, + }, #endif { }, /* terminate */ };