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cgroup_namespaces.7: Add some further explanation of the example shell session 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2017-06-13 11:17:16 +02:00
parent a2e2611cf1
commit 89cbd279f4
1 changed files with 15 additions and 1 deletions
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16
man7/cgroup_namespaces.7
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@ -111,7 +111,21 @@ $ \fBcat /proc/20124/cgroup | grep freezer\fP
7:freezer:/../sub2
.in
.fi
.PP
From the output of the first command,
we see that the freezer cgroup membership of the new shell
(which is in the same cgroup as the initial shell)
is shown defined relative to the freezer cgroup root directory
that was established when the new cgroup namespace was created.
(In absolute terms,
the new shell is in the
.I /sub
freezer cgroup,
and the root directory of the freezer cgroup hierarchy
in the new cgroup namespace is also
.IR /sub .
Thus, the new shell's cgroup membership is displayed as \(aq/\(aq.)
.PP
However, when we look in
.IR /proc/self/mountinfo
we see the following anomaly: