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Subject: [Bug 218009] dtrace -Z flag does not install newly loaded probes
Date: Wed, 22 Mar 2017 15:21:37 +0000
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: CURRENT
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X-Bugzilla-Severity: Affects Many People
X-Bugzilla-Who: domagoj.stolfa@gmail.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218009

            Bug ID: 218009
           Summary: dtrace -Z flag does not install newly loaded probes
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: domagoj.stolfa@gmail.com

When one runs a command such as:

# dtrace -Z -n 'fbt:vmm::'

and after that loads the bhyve kernel module, vmm using:

# kldload vmm

the probes do not seem to fire. This seems to indicate an issue with the fbt
provider in FreeBSD, as the same behaviour with different modules works fin=
e in
illumos.

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