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Date:      Tue, 14 Jan 2025 21:41:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 283747] kernel panic after telegraf service restart
Message-ID:  <bug-283747-227-TXayrajqo1@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-283747-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-283747-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D283747

--- Comment #24 from Gleb Smirnoff <glebius@FreeBSD.org> ---
On Tue Jan 14 11:19:58  2025 UTC, fax@nohik.ee wrote:
> then after boot I see 0 length ktrace file.

If the traced process exits (e.g. you no longer observe its PID in the list=
 of
processes), then ktrace(2) definitely writes everything to the file system.=
 Can
we make sure that telegraf indeed exists quickly after restart and doesn't =
the
old PID remains live until the panic?  If it does exit, then it is ZFS that
needs to be pushed to sync.  I will try to find answer how to do that.

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