Re: port-amd64/38478 (panic on boot when attaching cpu17)

["Christoph Egger" <Christoph_Egger%gmx.de@localhost>]

> Synopsis: panic on boot when attaching cpu17
> 
> State-Changed-From-To: open->feedback
> State-Changed-By: ad%NetBSD.org@localhost
> State-Changed-When: Sun, 11 May 2008 22:57:34 +0000
> State-Changed-Why:
> Can you confirm that this is fixed in -current?

Yes, partially at least.
There's still a panic on boot related to many cpus:

kernel double fault trap, code=0
Stopped in pid 0.12 (system) at netbsd:Xintr_lapic_ltimer+0x38: movq   
%rdi,0(%rsp)

%rsp value is 0xffff80004677afd0

The double fault comes from a stack corruption/overflow.
The interrupt stack is filled up with so many lapic timer handler's running 
concurrently.

I suggest to make the interrupt stack per-cpu.


-- 

Christoph