[Devel] Re: [PATCH] cgroups: handle failure of cgroup_populate_dir() at mount/remount

[Li Zefan]

KAMEZAWA Hiroyuki wrote:
> On Fri, 22 May 2009 11:00:12 +0800
> Li Zefan <lizf at cn.fujitsu.com> wrote:
> 
>> Now we have 'stat' file in both memory and cpuacct subsystems. If we
>> mount these 2 subsystems with option 'noprefix', the creation of 'stat'
>> file for cpuacct will fail, but without any notificatin to the user.
>>
>> With this patch, we fail the mount/remount in this case.
>>
> 
> Hm, shouldn't we allow "noprefix" to be effective only agaisnt cpuset ?
> I think it's just for backward-compatibility of cpuset.
> (I don't like the option at all.)
> 

Yes, this mount option was introduced for cpuset. But it has been here for
a long time and people may use it when mounting other cgroup subsystems,
then is it OK to change to restrict its use within cpuset only?


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