panic: spin lock held too long (reasonable load)

John Baldwin jhb at
Wed Jun 9 14:27:05 GMT 2004

On Wednesday 09 June 2004 09:25 am, Ian FREISLICH wrote:
> Hi
> I got this about an hour ago, maybe 10 minutes into a 'make world
> -j8' on my SMP system.  I'll reproduce the panic and drop into the
> debugger if possible if someone is willing to tell me what information
> appart from this backtrace will be helpful.

Unfortunately this is a known deadlock that can happen with swapping that 
there isn't an easy fix for.  If you want a quick hack, try commenting out 
the 'wakeup(&proc0)' line in setrunnable().  It might take a bit longer for 
the kernel to swap processes back in but should avoid the deadlock.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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