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From: Tejun Heo <tj@kernel.org>
To: oleg@redhat.com, jan.kratochvil@redhat.com, vda.linux@googlemail.com
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
	akpm@linux-foundation.org, indan@nul.nu, roland@hack.frob.com,
	Tejun Heo <tj@kernel.org>
Subject: [PATCH 14/20] job control: Small reorganization of wait_consider_task()
Date: Wed, 23 Mar 2011 11:06:00 +0100	[thread overview]
Message-ID: <1300874766-12941-15-git-send-email-tj@kernel.org> (raw)
In-Reply-To: <1300874766-12941-1-git-send-email-tj@kernel.org>

Move EXIT_DEAD test in wait_consider_task() above ptrace check.  As
ptraced tasks can't be EXIT_DEAD, this change doesn't cause any
behavior change.  This is to prepare for further changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
---
 kernel/exit.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index f9a45eb..b4a935c 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1537,6 +1537,10 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace,
 		return 0;
 	}
 
+	/* dead body doesn't have much to contribute */
+	if (p->exit_state == EXIT_DEAD)
+		return 0;
+
 	if (likely(!ptrace) && unlikely(task_ptrace(p))) {
 		/*
 		 * This child is hidden by ptrace.
@@ -1546,9 +1550,6 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace,
 		return 0;
 	}
 
-	if (p->exit_state == EXIT_DEAD)
-		return 0;
-
 	/*
 	 * We don't reap group leaders with subthreads.
 	 */
-- 
1.7.1


  parent reply	other threads:[~2011-03-23 10:06 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-23 10:05 [PATCHSET] ptrace,signal: Improve ptrace and job control interaction Tejun Heo
2011-03-23 10:05 ` [PATCH 01/20] signal: Fix SIGCONT notification code Tejun Heo
2011-03-23 10:05 ` [PATCH 02/20] ptrace: Remove the extra wake_up_state() from ptrace_detach() Tejun Heo
2011-03-23 10:05 ` [PATCH 03/20] signal: Remove superflous try_to_freeze() loop in do_signal_stop() Tejun Heo
2011-03-23 10:05 ` [PATCH 04/20] ptrace: Kill tracehook_notify_jctl() Tejun Heo
2011-03-23 10:05 ` [PATCH 05/20] ptrace: Add @why to ptrace_stop() Tejun Heo
2011-03-23 10:05 ` [PATCH 06/20] signal: Fix premature completion of group stop when interfered by ptrace Tejun Heo
2011-03-23 10:05 ` [PATCH 07/20] signal: Use GROUP_STOP_PENDING to stop once for a single group stop Tejun Heo
2011-03-23 10:05 ` [PATCH 08/20] ptrace: Participate in group stop from ptrace_stop() iff the task is trapping for " Tejun Heo
2011-03-23 10:05 ` [PATCH 09/20] ptrace: Make do_signal_stop() use ptrace_stop() if the task is being ptraced Tejun Heo
2011-03-23 10:05 ` [PATCH 10/20] ptrace: Clean transitions between TASK_STOPPED and TRACED Tejun Heo
2011-03-23 10:05 ` [PATCH 11/20] ptrace: Collapse ptrace_untrace() into __ptrace_unlink() Tejun Heo
2011-03-23 10:05 ` [PATCH 12/20] ptrace: Always put ptracee into appropriate execution state Tejun Heo
2011-03-23 10:05 ` [PATCH 13/20] job control: Don't set group_stop exit_code if re-entering job control stop Tejun Heo
2011-03-23 10:06 ` Tejun Heo [this message]
2011-03-23 10:06 ` [PATCH 15/20] job control: Fix ptracer wait(2) hang and explain notask_error clearing Tejun Heo
2011-03-23 10:06 ` [PATCH 16/20] job control: Allow access to job control events through ptracees Tejun Heo
2011-03-23 10:06 ` [PATCH 17/20] job control: Add @for_ptrace to do_notify_parent_cldstop() Tejun Heo
2011-03-23 10:06 ` [PATCH 18/20] job control: Job control stop notifications should always go to the real parent Tejun Heo
2011-03-23 10:06 ` [PATCH 19/20] job control: Notify the real parent of job control events regardless of ptrace Tejun Heo
2011-03-23 10:06 ` [PATCH 20/20] job control: Don't send duplicate job control stop notification while ptraced Tejun Heo
2011-03-23 18:38 ` [PATCHSET] ptrace,signal: Improve ptrace and job control interaction Oleg Nesterov
2011-03-25 14:26   ` Tejun Heo
2011-03-26 18:25     ` Oleg Nesterov
2011-03-28  8:58       ` Tejun Heo
2011-03-28 12:14         ` Oleg Nesterov
2011-03-28 15:21           ` Tejun Heo

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