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Date:      Mon, 29 Aug 2022 17:21:07 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 266098] dtrace: error on enabled probe ID 2 (ID 79710: io:kernel:none:start): invalid address (0x20) in action #4 at DIF offset 16
Message-ID:  <bug-266098-227-t7pjy7vYEi@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-266098-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-266098-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D266098

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |markj@FreeBSD.org
           Assignee|bugs@FreeBSD.org            |markj@FreeBSD.org

--- Comment #1 from Mark Johnston <markj@FreeBSD.org> ---
It's because there is a io:::start probe in devstat_start_transaction(), but
there is no BIO to reference.  I'll commit a patch to remove those probes,
since I don't think they're very useful.

BTW, this script isn't going to give you much information on FreeBSD.  The =
io
probes are too "deep" in the I/O path to retain any association with the
process that initiated the I/O.  That is, "execname" will not tell you much=
.=20
In some cases it might, but that depends on the filesystem and GEOM provide=
rs
in use.

--=20
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