Re: [PATCH v2] cgroup: don't destroy the default root

2014-06-04 Thread Tejun Heo
On Wed, Jun 04, 2014 at 04:48:15PM +0800, Li Zefan wrote: > The default root is allocated and initialized at boot phase, so we > shouldn't destroy the default root when it's umounted, otherwise > it will lead to disaster. > > Just try mount and then umount the default root, and the kernel will > c

[PATCH v2] cgroup: don't destroy the default root

2014-06-04 Thread Li Zefan
The default root is allocated and initialized at boot phase, so we shouldn't destroy the default root when it's umounted, otherwise it will lead to disaster. Just try mount and then umount the default root, and the kernel will crash immediately. v2: - No need to check for CSS_NO_REF in cgroup_get