Re: Oops in ring_buffer_alloc_read_page()

2013-06-23 Thread Andi Kleen
> Good question! I tried disabling CPA self-test and the BUG does not > show up for 1 boots. So this should be the root cause. > The test is very different now than what I wrote originally, but I would generally expect any bug to be in change_page_attr(), not be in the self test. > > > [ 3

Re: Oops in ring_buffer_alloc_read_page()

2013-06-22 Thread Fengguang Wu
CC Andi. I wonder whether the CPA self-test is expected to cause such problems. On Thu, Jun 20, 2013 at 10:05:49AM -0400, Steven Rostedt wrote: > On Tue, 2013-06-18 at 20:08 +0800, Fengguang Wu wrote: > > Greetings, > > > > I got the below oops in upstream. It's a hard to reproduce one and at > >

Re: Oops in ring_buffer_alloc_read_page()

2013-06-20 Thread Steven Rostedt
On Tue, 2013-06-18 at 20:08 +0800, Fengguang Wu wrote: > Greetings, > > I got the below oops in upstream. It's a hard to reproduce one and at > least is as old as v3.0. > > [ 36.774933] IP: [<7916a472>] ring_buffer_alloc_read_page+0x66/0x82 > [ 36.776024] *pde = 0e3e1067 *pte = 061e7260 > [