[RFC][PATCH v2 3/7] taskstats: Add thread group ID to taskstats structure

From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
To: Shailabh Nagar <nagar1234@in.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Venkatesh Pallipadi <venki@google.com>,
	Suresh Siddha <suresh.b.siddha@intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Ingo Molnar <mingo@elte.hu>, Oleg Nesterov <oleg@redhat.com>,
	John stultz <johnstul@us.ibm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Balbir Singh <balbir@linux.vnet.ibm.com>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Roland McGrath <roland@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [RFC][PATCH v2 3/7] taskstats: Add thread group ID to taskstats structure
Date: Thu, 11 Nov 2010 18:03:55 +0100	[thread overview]
Message-ID: <20101111170814.601425734@linux.vnet.ibm.com> (raw)
In-Reply-To: 20101111170352.732381138@linux.vnet.ibm.com

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

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

Signed-off-by: Michael Holzheu <holzheu@linux.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;

