Re: Getting the name of a kernel thread?

[Martin Husemann <martin%duskware.de@localhost>]

On Thu, Apr 15, 2021 at 01:39:23PM -0700, Brian Buhrow wrote:
> 	hello.  I just got two panics on a system running NetBSD-9.99.77/amd64.  Unfortunately, I
> didn't have enough swap configured to capture a dump file.  However, I did figure out that the
> problem is in  thread 6 of the kernel process, process 0.  However,  I am having trouble
> figuring out what the name of thread 6  is.  Is there a key word I can use with ps(1) to see
> the name of a particular thread?  I thought I might be able to do it with the wchan field, but
> for this particular thread, the wchan field is "-".  If I can figure out what thread 6 is on
> this system, it might give me a clue as to where the problem might be.  The problem is hard to
> reproduce, so any data I can get from the running system would be helpful.

I'd use crash to get the "life" ddb experience:

> crash
crash> ps
PID    LID S CPU     FLAGS       STRUCT LWP *               NAME WAIT
[..]
0       10 3   0       200          106ea84c0           nfssilly nfssilly
0        9 3   0       240          106ea8080             vdrain vdrain
0        8 3   0       240          106e979c0          modunload mod_unld
0        7 3   0       200          106e97580            xcall/0 xcall
0        6 1   0       200          106e97140          softser/0
0        5 1   0       200          106e96d00          softclk/0
0        4 1   0       200          106e968c0          softbio/0
0        3 1   0       200          106e96480          softnet/0
0        2 1   0       201          106e96040             idle/0
0        0 3   0       200            1c5e100            swapper uvm

Martin