[Bug 288777] System freezes after upgrading to 14.3-RELEASE

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=288777

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
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             Status|New                         |Open
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--- Comment #9 from Mark Johnston <markj@FreeBSD.org> ---
(In reply to Bren from comment #0)
> dumpdev is set to AUTO but no crash dump is generated. As I understand it, I would need swap with enough space to handle the amount of memory the system has + 10% or so. Right now it's using the default 2GB. I've looked into options but it looks like the only thing I can do is rebuild this box entirely with more swap, which I am willing to do if that helps get this fixed.

A couple of points here:
- modern kernel dumps are not full RAM dumps, they only include those pages of
kernel memory which ought to be relevant to a crash.  So the dump partition can
be a fair bit smaller than RAM in practice.
- You can add dumpon_flags="-Z" to ask the kernel to compress kernel dumps,
which further reduces the space requirement.

If the watchdog is triggering a panic and you see no output about a kernel
dump, I suspect dumps might not be configured after all (otherwise the kernel
would print a message about insufficient space to the console).  What does
'dumpon -l' print on the running system?

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