Re: [PATCH] Documentation: update the description of TracerPid in procfs.rst

[Jonathan Corbet <corbet@lwn.net>]

Chen Linxuan <chenlinxuan@uniontech.com> writes:

> When the tracer of process is outside of current pid namespace, field
> `TracerPid` in /proc/<pid>/status will be 0, too, just like this process
> not have been traced.
>
> This is because that function `task_pid_nr_ns` used to get the pid of
> tracer will return 0 in this situation.
>
> Co-authored-by: Yuan Haisheng <heysion@deepin.com>
> Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
> ---
>  Documentation/filesystems/proc.rst | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
> index 898c99eae8e4..e98e0277f05e 100644
> --- a/Documentation/filesystems/proc.rst
> +++ b/Documentation/filesystems/proc.rst
> @@ -245,7 +245,8 @@ It's slow but very precise.
>   Ngid                        NUMA group ID (0 if none)
>   Pid                         process id
>   PPid                        process id of the parent process
> - TracerPid                   PID of process tracing this process (0 if not)
> + TracerPid                   PID of process tracing this process (0 if not, or
> +                             the tracer is outside of the current pid namespace)

Applied, thanks.

jon