Hello, Li. On Wed, Feb 19, 2014 at 09:39:28AM +0800, Li Zefan wrote: > > Can we make it optional so that users who don't care about it can > > ignore it? > > cgroupfs also needs this to fix refcnt leak.
Ah, okay. > Because success in finding an existing cgroup_root doesn't mean no new > superblock is needed. For example: > > # mount -t cgroup -o cpuacct xxx /cgroup > # mkdir /cgroup/tmp > # umount /cgroup <--- sb will be freed but cgroup_root won't > > // this will allocate new sb, but we find the cgroup_root is there. > # mount -t cgroup -o cpuacct xxx /cgroup > > But debugfs won't need this if it's converted to kernfs. > > How about I keep kernfs_mount() API intact, and when this fix gets > merged into mainline, you merge the fix into cgroup-next, and then > I make a fix for cgroup by changing kernfs_mount()? If we need kernfs_mount() modified anyway, let's do it in this patch. I still think it'd be better to allow the parameter to be NULL but other than that, no objection. Thanks! -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
