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Date:      Thu, 9 Aug 2018 13:09:00 +0200
From:      "Patrick M. Hausen" <hausen@punkt.de>
To:        freebsd-virtualization@freebsd.org
Subject:   Why can't I dtrace processes running in a jail from the host?
Message-ID:  <FB08F1C9-C066-4C78-8D35-E2A522ADC8F8@punkt.de>

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Hi all,

I'm wondering why on a busy hosting server with hundreds of PHP-FPM
workers running in jails "dtrace -l" on the host does not show any
PHP specific probes. PHP *is* compiled with dtrace support for all the
jails.

Enabling /dev/dtrace/* via devfs.rules for a specific jail and then repeating
the process *inside* the jail works as expected.

Shouldn't jailed processes be transparently visible from the host system
but not vice versa?

Thanks,
Patrick
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