On 2014/6/28 19:58, Tejun Heo wrote:
> Hello, Li.
>
> On Fri, Jun 27, 2014 at 05:13:12PM +0800, Li Zefan wrote:
>> +for_each_subsys(ss, i) {
>> +if (!(opts.subsys_mask & (1 << i)) ||
>> +ss->root == &cgrp_dfl_root)
>> +continue;
>> +
>> +
Hello, Li.
On Fri, Jun 27, 2014 at 05:13:12PM +0800, Li Zefan wrote:
> + for_each_subsys(ss, i) {
> + if (!(opts.subsys_mask & (1 << i)) ||
> + ss->root == &cgrp_dfl_root)
> + continue;
> +
> + if (!percpu_ref_tryget_live(&ss->root->c
Made a mistake again.. :(
==
From: Li Zefan
Subject: [PATCH 1/3] cgroup: fix mount failure in a corner case
# cat test.sh
#! /bin/bash
mount -t cgroup -o cpu xxx /cgroup
umount /cgroup
mount -t cgroup -o cpu,cpuacct xxx /cgroup
umount /cgroup
# ./test.sh
mount: xx
Oh sorry the cut&paste was incomplete. Here's the complete one:
From: Li Zefan
Date: Thu, 12 Jun 2014 09:11:00 +0800
Subject: [PATCH v2 1/3] cgroup: fix mount failure in a corner case
# cat test.sh
#! /bin/bash
mount -t cgroup -o cpu xxx /cgroup
umoun
# cat test.sh
#! /bin/bash
mount -t cgroup -o cpu xxx /cgroup
umount /cgroup
mount -t cgroup -o cpu,cpuacct xxx /cgroup
umount /cgroup
# ./test.sh
mount: xxx already mounted or /mnt busy
mount: according to mtab, xxx is already mounted on /mnt
It's because the cgroupfs_root of
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