On 2013/8/19 11:32, Ming Lei wrote: > Hi, > > The kernel oops[1] is triggered during kernel boot with the latest next > tree(3.11.0-rc5-next-20130816), looks it is caused by reference to > uninitialized > percpu ref of root cgroup, and below patch can fix the problem: >
Thanks for the report. Li Zhong has summited a patch to fix it: www.spinics.net/lists/linux-next/msg26414.html and it should show up in linux-next tree when next is updated. > diff --git a/kernel/cgroup.c b/kernel/cgroup.c > index 723194f..0e8954b 100644 > --- a/kernel/cgroup.c > +++ b/kernel/cgroup.c > @@ -4485,7 +4485,8 @@ static long cgroup_create(struct cgroup *parent, > struct dentry *dentry, > struct cgroup_subsys_state *css = css_ar[ss->subsys_id]; > > dget(dentry); > - percpu_ref_get(&css->parent->refcnt); > + if (!(css->parent->flags & CSS_ROOT)) > + percpu_ref_get(&css->parent->refcnt); > } > -- 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/
