Re: [PATCH] Introduce ActivePid: in /proc/self/status (v2, wasVpid:)
From: Oleg Nesterov
Date: Thu Jun 16 2011 - 12:25:20 EST
On 06/16, Eric W. Biederman wrote:
>
> I remember there were a few very weird things with pids when ptracing
> a process in another pid namespace.
The only problems is pids. PTRACE_EVENT_FORK/etc reports the global pid.
This is fixable. Some tracers look at syscall_get_return_value() register
and get the "local" pid which they do not want.
> It may be that ActivePid is enough
> to allow the tracer to figure out the confusing information it is
> getting.
I don't think so. ActivePid doesn't help unless you know all pids in
this container.
> I would be surprised if using ptrace to send signals is how you
> want to do things.
Yes, yes, this is hack.
Oleg.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/