Re: Crash with HEAD on amd64 - in setrunnable()

[Paul Goyette <paul%whooppee.com@localhost>]

On Sun, 24 Nov 2019, Paul Goyette wrote:

> With a very current kernel, I just got this:
>
> # crash -M /var/crash/netbsd.21.core -N /netbsd.gdb
> Crash version 9.99.18, image version 9.99.18.
> System panicked: kernel diagnostic assertion "lwp_locked(l, 
> l->l_cpu->ci_schedstate.spc_lwplock)" failed: file 
> "/build/netbsd-local/src_ro/sys/kern/kern_synch.c", line 910
> Backtrace from time of crash is available.
> crash> bt
> _KERNEL_OPT_NVGA_RASTERCONSOLE() at 0
> ?() at ffffde890ce0af54
> vpanic() at vpanic+0x181
> kern_assert() at kern_assert+0x48
> setrunnable() at setrunnable+0x179
> lwp_start() at lwp_start+0xba
> do_lwp_create() at do_lwp_create+0xa1
> sys__lwp_create() at sys__lwp_create+0xc1
> syscall() at syscall+0x28a
> --- syscall (number 309) ---
> 45ae46:
> crash>
>
>
> (Obviously, I have a core dump, so I'll be happy to investigate further
> if anyone has suggestions.)

Perhaps this is the "potential panic" that ad@ references in this commit
log message?   :)

> Module Name:    src
> Committed By:   ad
> Date:           Sun Nov 24 13:23:57 UTC 2019
>
> Modified Files:
>         src/sys/kern: kern_lwp.c

> Log Message:
> lwp_start(): don't try to change the target CPU.  Fixes potential panic
> in setrunnable(). Oops, experimental change that escaped.
>
>
> To generate a diff of this commit:
> cvs rdiff -u -r1.213 -r1.214 src/sys/kern/kern_lwp.c



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