[PATCH] stat shows wrong ppid

[Dinakar Guniguntala <dino@in.ibm.com>]

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Hi,

One more place in fs/proc/array.c where ppid is wrong, which
I missed in my previous mail to lkml

Please apply

Regards,

Dinakar

Signed-off-by: Dinakar Guniguntala <dino@in.ibm.com>


On Thu, Oct 07, 2004 at 04:33:23PM +0530, Dinakar Guniguntala wrote:
> Hi,
> 
> /proc shows the wrong PID as parent in the following case
> 
> Process A creates Threads 1 & 2 (using pthread_create)
> Thread 2 then forks and execs process B
> getppid() for Process B shows Process A (rightly) as parent,
> however /proc/B/status shows Thread 2 as PPid (incorrect)
> 
> Following patch has been tested and it works ok
> 
> Regards,
> 
> Dinakar
> 

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diff -Naurp linux-2.6.9-rc3-mm2.orig/fs/proc/array.c linux-2.6.9-rc3-mm2/fs/proc/array.c
--- linux-2.6.9-rc3-mm2.orig/fs/proc/array.c	2004-10-19 15:05:58.259265024 +0530
+++ linux-2.6.9-rc3-mm2/fs/proc/array.c	2004-10-19 15:09:52.474658872 +0530
@@ -370,7 +370,7 @@ static int do_task_stat(struct task_stru
 			stime += task->signal->stime;
 		}
 	}
-	ppid = task->pid ? task->real_parent->pid : 0;
+	ppid = task->pid ? task->group_leader->real_parent->tgid : 0;
 	read_unlock(&tasklist_lock);
 
 	if (!whole || num_threads<2)