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SubjectRe: [TOMOYO #12 (2.6.28-rc2-mm1) 06/11] Common functions for TOMOYOLinux.
Quoting Tetsuo Handa (penguin-kernel@I-love.SAKURA.ne.jp):
> Hello.
>
> Andrew Morton wrote:
> > > +static bool is_select_one(struct tmy_io_buffer *head, const char *data)
> > > +{
> > > + unsigned int pid;
> > > + struct domain_info *domain = NULL;
> > > +
> > > + if (sscanf(data, "pid=%u", &pid) == 1) {
> >
> > PIDs are no longer system-wide unique, and here we appear to be
> > implementing new userspace ABIs using PIDs.
> >
> I'm not familiar with virtualized environment.
>
> There are two PIDs, PID seen from inside virtualized environment and
> PID seen from outside virtualized environment. To clarify, let me call
> the former "PIDv" and the latter "PIDg".
>
> PIDv is not system-wide unique. But PIDg is system-wide unique, aren't they?
> The PID received from outside virtualized environment is PIDg and they are
> system-wide unique, am I right?

You are doing find_task_by_vpid(), so you are not looking up a task by
global pid.

-serge


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