On Mon, Oct 10, 2016 at 09:02:53AM -0400, Tejun Heo wrote: > Hello, Michael. > > On Mon, Oct 10, 2016 at 09:22:55PM +1100, Michael Ellerman wrote: > > This patch seems to be causing one of my Power8 boxes not to boot. > > > > Specifically commit 3347fa092821 ("workqueue: make workqueue available > > early during boot") in linux-next. > > > > If I revert this on top of next-20161005 then the machine boots again. > > > > I've attached the oops below. It looks like the cfs_rq of p->se is NULL? > > Hah, weird that it's arch dependent, or maybe it's just different > config options. Most likely, it's caused by workqueue_init() call > being moved too early. Can you please try the following patch and see > whether the problem goes away?
And if it does, can you please post the boot log with kernel boot option "initcall_debug=1" specified? Thanks. -- tejun