[Suggestion] kernel: cgroup: mount failure in LTP cgroup_regression_test.sh
Chen Gang
gang.chen.5i5j at gmail.com
Thu Nov 21 02:21:13 UTC 2013
On 11/21/2013 01:35 AM, Tejun Heo wrote:
> Hello,
>
> Sorry about the delay.
>
Oh, No problem, every members time resources are expensive, thank you
for your reply.
> On Fri, Nov 08, 2013 at 04:15:23PM +0800, Chen Gang wrote:
>> After simplify, the related operation, environments and output are:
>>
>> [root at gchenlinux tmp]# df -Th | grep cgroup
>> tmpfs tmpfs 1001M 0 1001M 0% /sys/fs/cgroup
>> [root at gchenlinux tmp]# lsof | grep cgroup | grep -v grep
>> systemd 1 root 6r DIR 0,18 0 5998 /sys/fs/cgroup/systemd/system
>> [root at gchenlinux tmp]# cat /proc/cgroups
>> #subsys_name hierarchy num_cgroups enabled
>> cpuset 3 4 1
>> cpu 4 35 1
>> cpuacct 4 35 1
>> freezer 5 4 1
>> [root at gchenlinux tmp]# mkdir cgroup
>> [root at gchenlinux tmp]# mount -t cgroup -o freezer,cpuacct xxx cgroup/
>> mount: xxx already mounted or cgroup/ busy
>>
>> Is it real issue of cgroup? If it is, I will/should continue analyzing.
>
> Hmmm... I'm a bit confused. What is it testing? "cat /proc/cgroup"
> is showing that freezer is already mounted and the kernel seems to
> have correctly refused to mount it in a different hierarchy. What am
> I missing here?
>
Hmm... I am not quit familiar about it, either, but at least I can
contact related LTP members (I guess they can make sure about it).
Excuse me, I am changing/finding new job, so I should not use Asianux
Corporation mail again. And it seems I can not be focus on upstream
kernel as much as before. :-(
But at least, I will/should continue providing some contributions (more
or less) to Public Open Source as volunteers. And for upstream kernel,
I plan to make 1-3 patches per month (mainly for cross compiling).
- if can not get companies support, I can not provide enough time
resource on upstream kernel (I have to get pay check for family).
- New company may mainly focus on open source tool chains (not only
kernel), so I will/should also provide some contributions to them
(e.g. KVM, GCC ...).
At last, sorry again for I have to give up 10 patches per month for
upstream kernel.
Thanks.
--
Chen Gang
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