Re: Notification when a task is created/exits

[KAMEZAWA Hiroyuki]

On Tue, 16 Feb 2010 11:18:25 +0530
"Leonidas ." <leonidas137@xxxxxxxxx> wrote:

> Hi folks,
> 
> Is it possible to register a set of callbacks from my module so that
> these call backs get called
> whenever a certain task is created or exits. Basically, I want to keep
> track of all the threads
> which are created and are exiting, my module should get notified of
> these events somehow.
> One way is to call my functions directly from the task creation and
> exit functions, but I personally
> do not like this approach since I dont want to mess with this core kernel code.
> 

AFAIK, there are no extensible notifier chain at task create/exit.
But I think you have 2 options.

 1. use NETLINK and catch task create/exit in userland.
    But this means "catch" is asyncronous.

 2. implement cgroup subsystem
    AFAIK, in the latest kernel, cgroup subsystem can be implemented as module. 
    cgroup has fork/exit handler.
    And you can implement some useful controls for tasks you watch via
    cgroup's control interface.

Thanks,
-Kame


> -Leo.
> --
> 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/
> 

--
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/