Re: [PATCH] include children count, in Threads: field present in /proc/<pid>/status (take-1)

[girish]

On Sep 30, 2006, at 1:31 AM, William Pitcock wrote:

> On Sep 29, 2006, at 10:18 AM, girish wrote:
>
> > -	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
> > +	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads +  
> > num_children);
>
> Personally, I'd prefer the children count to be separate, something  
> like:
>
> buffer += sprintf(buffer, "Threads:\t%d (%d children, %d total)",  
> num_threads, num_children, num_threads + num_children);
>
> That would be rather nice, indeed.
>
> Also, next time, make sure that linux-kernel is CC'd, not BCC'd.
>
> ---
> William Pitcock
> nenolod@xxxxxxxxxx
> http://people.atheme.org/~nenolod/
> http://nenolod.net

Agree.  It indeed look better. I too had an awk script in mind, to  
parse the line.  I ended up removing such formatting, because not all  
process spawn child thread(s), showing num_children count as zero.  
That looked bit odd. So here it is again - new wine.

Thanks.

Signed-off-by: Girish V. Gulawani <girishvg@xxxxxxxxx>
--- linux-vanilla/fs/proc/array.c	2006-09-20 12:42:06.000000000 +0900
+++ linux/fs/proc/array.c	2006-09-30 01:47:25.000000000 +0900
@@ -248,6 +248,8 @@ static inline char * task_sig(struct tas
 	int num_threads = 0;
 	unsigned long qsize = 0;
 	unsigned long qlim = 0;
+	int num_children = 0;
+	struct list_head *_p;

 	sigemptyset(&pending);
 	sigemptyset(&shpending);
@@ -268,9 +270,14 @@ static inline char * task_sig(struct tas
 		qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
 		spin_unlock_irq(&p->sighand->siglock);
 	}
+	list_for_each(_p, &p->children)
+		++num_children;
 	read_unlock(&tasklist_lock);

-	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
+	buffer += sprintf(buffer, "Threads:\t%d", num_threads);
+	if (num_children)
+		buffer += sprintf(buffer, " (%d children, %d total)",  
num_children, num_threads + num_children);
+	buffer += sprintf(buffer, "\n");
 	buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);

 	/* render them all */
-
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