linux-kernel - [PATCH] eligible_child: remove an obsolete ->tgid check

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Date:	Sat, 2 Sep 2006 21:22:16 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Andrew Morton <akpm@...l.org>, Andreas Hobein <ah2@...air.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Roland McGrath <roland@...hat.com>
Subject: [PATCH] eligible_child: remove an obsolete ->tgid check

It is not possible to find a sub-thread in ->children/->ptrace_children
lists, ptrace_attach() does not allow to attach to sub-threads.

Even if it was possible to ptrace the task from the same thread group,
we can't allow to release ->group_leader while there are others (ptracer)
threads in the same group.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>

--- 2.6.18-rc4/kernel/exit.c~	2006-09-02 21:08:59.000000000 +0400
+++ 2.6.18-rc4/kernel/exit.c	2006-09-02 21:09:12.000000000 +0400
@@ -1051,7 +1051,7 @@ static int eligible_child(pid_t pid, int
 	 * Do not consider thread group leaders that are
 	 * in a non-empty thread group:
 	 */
-	if (current->tgid != p->tgid && delay_group_leader(p))
+	if (delay_group_leader(p))
 		return 2;
 
 	if (security_task_wait(p))


-- 
VGER BF report: U 0.499788
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