* How to find the child processes?
[not found] <6089e33a-29ad-4df9-aac8-006e9b42fbfa@mail5.gatech.edu>
@ 2012-02-11 3:45 ` Surenkumar Nihalani
2012-02-11 5:12 ` Dave Hylands
0 siblings, 1 reply; 2+ messages in thread
From: Surenkumar Nihalani @ 2012-02-11 3:45 UTC (permalink / raw)
To: kernelnewbies
Hi guys,
I need help, again. I am writing a kernel module. I have the pid and tid from the current structure. How do I figure our the number of threads in the given process id?
If possible, how do I get the individual tids within the pid?
Thanks,
Suren Nihalani.
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* How to find the child processes?
2012-02-11 3:45 ` How to find the child processes? Surenkumar Nihalani
@ 2012-02-11 5:12 ` Dave Hylands
0 siblings, 0 replies; 2+ messages in thread
From: Dave Hylands @ 2012-02-11 5:12 UTC (permalink / raw)
To: kernelnewbies
Hi Suren,
On Fri, Feb 10, 2012 at 7:45 PM, Surenkumar Nihalani <suren@gatech.edu> wrote:
> Hi guys,
>
> I need help, again. I am writing a kernel module. I have the pid and tid
> from the current structure. How do I figure our the number of threads in the
> given process id?
> If possible, how do I get the individual tids within the pid?
So I took a look at how /proc/TTT/task was implemented, and basically
it uses next_thread from sched.h, which follows the thread_group
structure stored inside task_struct.
You need to acquire the appropriate locks and do checks to make sure
that the thread hasn't died on you, but that's the jist of it.
--
Dave Hylands
Shuswap, BC, Canada
http://www.davehylands.com
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2012-02-11 3:45 ` How to find the child processes? Surenkumar Nihalani
2012-02-11 5:12 ` Dave Hylands
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