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| author | Eric W. Biederman <ebiederm@xmission.com> | 2010-03-02 23:51:53 +0100 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-19 14:59:09 +0100 |
| commit | 17cf22c33e1f1b5e435469c84e43872579497653 (patch) | |
| tree | c5cec307c06f7e4ddc26e04e73c8833897b67113 /Documentation/debugging-modules.txt | |
| parent | pidns: Capture the user namespace and filter ns_last_pid (diff) | |
| download | linux-17cf22c33e1f1b5e435469c84e43872579497653.tar.xz linux-17cf22c33e1f1b5e435469c84e43872579497653.zip | |
pidns: Use task_active_pid_ns where appropriate
The expressions tsk->nsproxy->pid_ns and task_active_pid_ns
aka ns_of_pid(task_pid(tsk)) should have the same number of
cache line misses with the practical difference that
ns_of_pid(task_pid(tsk)) is released later in a processes life.
Furthermore by using task_active_pid_ns it becomes trivial
to write an unshare implementation for the the pid namespace.
So I have used task_active_pid_ns everywhere I can.
In fork since the pid has not yet been attached to the
process I use ns_of_pid, to achieve the same effect.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'Documentation/debugging-modules.txt')
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