linux-kernel - [RFC][PATCH 06/10] taskstats: Add thread group ID to taskstats structure

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Date:	Thu, 23 Sep 2010 16:01:39 +0200
From:	Michael Holzheu <holzheu@...ux.vnet.ibm.com>
To:	Shailabh Nagar <nagar1234@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	John stultz <johnstul@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Oleg Nesterov <oleg@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 06/10] taskstats: Add thread group ID to taskstats
 structure

Subject: [PATCH] taskstats: Add thread group ID to taskstats structure

From: Michael Holzheu <holzheu@...ux.vnet.ibm.com>

The tgit is important for aggregating threads in user space. Therefore
we
add the tgid to the taskstats structure.

Signed-off-by: Michael Holzheu <holzheu@...ux.vnet.ibm.com>
---
 include/linux/taskstats.h |    1 +
 kernel/tsacct.c           |    1 +
 2 files changed, 2 insertions(+)

--- a/include/linux/taskstats.h
+++ b/include/linux/taskstats.h
@@ -167,6 +167,7 @@ struct taskstats {
 
 	/* Timestamp where data has been collected in ns since boot time */
 	__u64	time_ns;
+	__u32	ac_tgid;		/* Thread group ID */
 };
 
 
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -56,6 +56,7 @@ void bacct_add_tsk(struct taskstats *sta
 	stats->ac_nice	 = task_nice(tsk);
 	stats->ac_sched	 = tsk->policy;
 	stats->ac_pid	 = tsk->pid;
+	stats->ac_tgid	 = tsk->tgid;
 	rcu_read_lock();
 	tcred = __task_cred(tsk);
 	stats->ac_uid	 = tcred->uid;


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