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Date:      Wed, 22 Feb 2023 16:59:43 +0000
From:      bugzilla-noreply@freebsd.org
To:        x11@FreeBSD.org
Subject:   [Bug 266315] linuxkpi panic after recent updates (13.1-STABLE #0 stable/13-9cbba5950: Wed Sep  7 23:42:41 CEST 2022)
Message-ID:  <bug-266315-7141-FWjev2edDE@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-266315-7141@https.bugs.freebsd.org/bugzilla/>
References:  <bug-266315-7141@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D266315

--- Comment #36 from Paul Dufresne <dufresnep@zoho.com> ---
Sorry... I am still a bit newbie.

Is the information you give are in /var/messages files, or is it you that g=
et
it from procedure described in:
https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/

I note that:
dumpon -l
shows the device where crash info is saved in swap area before rebooting af=
ter
a kernel panic

savecore -C -v
(to be done after the reboot I think)
would show if a crash report exist

if it exist:
savecore -v
should save core crash in /var/crash
while
savecore -v .
would save core crash in current directory

then:
kgdb -n last
would get you in kernel debugger where info you given would be shown.

but the interesting part is after, read lines 41 and 53 in the:
https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/

where you get shown source code, and the backtrace.

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