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Re: kern/54908: kernel semi-lock-up
The following reply was made to PR kern/54908; it has been noted by GNATS.
From: Andrew Doran <ad%netbsd.org@localhost>
Subject: Re: kern/54908: kernel semi-lock-up
Date: Thu, 30 Jan 2020 19:07:26 +0000
Other things that would be useful:
- Straight "bt" to trace back through the interrupt into the CPU hog would
- If arm supports "mach cpu 0" / "mach cpu 1" to teleport onto the other CPU
and do a "bt" there that would be enlightening. Trace by LWP generally
doesn't work on running LWPs because the values saved in the PCB are out
- If any of that produces decent results, the routine / line of code where
the hang in pgdaemon / softclk is.
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