[Patch v2] cgroup: pretty format /proc/cgroups

From: Wei Yang
Date: Sun Nov 14 2021 - 20:13:43 EST


Current /proc/cgroups looks like this:

subsys_name hierarchy num_cgroups enabled
cpuset 3 1 1
cpu 2 1 1
cpuacct 2 1 1
memory 4 71 1
freezer 5 1 1

Let's align the title and value. After this patch, it looks like this.

subsys_name hierarchy num_cgroups enabled
cpuset 5 1 1
cpu 3 1 1
cpuacct 3 1 1
memory 2 71 1
freezer 4 1 1

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>

---
v2: the title line is omitted for the start "#"

---
kernel/cgroup/cgroup-v1.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index 81c9e0685948..5b177e0eca2c 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -664,7 +664,7 @@ int proc_cgroupstats_show(struct seq_file *m, void *v)
*/

for_each_subsys(ss, i)
- seq_printf(m, "%s\t%d\t%d\t%d\n",
+ seq_printf(m, "%12s\t%9d\t%11d\t%7d\n",
ss->legacy_name, ss->root->hierarchy_id,
atomic_read(&ss->root->nr_cgrps),
cgroup_ssid_enabled(i));
--
2.33.1