spin lock panic in 5.2-REL

[Peter Losher]

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On Wednesday 28 January 2004 09:43 am, John Baldwin wrote:
> > Yes, I was running a kernel for a short while w/ INVARIANTS and
> > WITNESS, but it was basically useless after a couple of hours under
> > load under the giant lock.  How much of a performance hit is just
> > WITNESS?
>
> A lot.  I think Robert Watson has seen as high a performance impact as
> 40%.

Oh joy - that's a non-starter... :(

And it just happened again:
- -=-
spin lock sched lock held by 0x8d2f7a00 for > 5 seconds
panic: spin lock held too long
cpuid = 4;
Debugger("panic")
Stopped at      Debugger+0x55:  xchgl   %ebx,in_Debugger.0
db>
- -=-

If there is anything else I can provide that doesn't make the system slow 
as molassess to help debug,  I am all ears. 

Best Wishes - Peter
- -- 
Peter_Losher at isc.org | ISC | OpenPGP Key E8048D08 | "The bits must flow"
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