Re: x86_64 DOM0 SMP oops

[Ryan Harper <ryanh@us.ibm.com>]

* Chris Wright <chrisw@osdl.org> [2005-08-22 14:26]:
> * Ryan Harper (ryanh@us.ibm.com) wrote:
> > > > Unable to handle kernel NULL pointer dereference at 000000000000001c RIP:
> > > > <ffffffff80112c1a>{retint_kernel+0}
> > > > PGD aae067 PUD aaf067 PMD 0
> > > > Oops: 0000 [1] PREEMPT SMP
> > > 
> > > Not surprising, w/ PREEMPT.  Is it stable w/out PREEMPT?
> > 
> > Really?  I thought CONFIG_PREEMPT was tested since it was on for x86_32
> > SMP.
> 
> No, I expect it to be broken (and you seem to be able to easily prove
> that ;-)
> 
> > I'll give that a shot and let you know.

That seems to have done it.  Built several kernels back-to-back, no
oops.

Now if I could just get this to go away:

Timer ISR/1: Time went backwards: delta=-169458624 cpu_delta=1110558976
shadow=57067465250 off=133093726 processed=57370017600
cpu_processed=56090000000
 0: 57370017600
  1: 56090000000

Anyone else with a dual-opteron see this?  It shows up on everything
(x86_64 UP, x86_32 UP/SMP).

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh@us.ibm.com