Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760597AbZCaNeF (ORCPT ); Tue, 31 Mar 2009 09:34:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760271AbZCaNd2 (ORCPT ); Tue, 31 Mar 2009 09:33:28 -0400 Received: from mga01.intel.com ([192.55.52.88]:25809 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760168AbZCaNd1 (ORCPT ); Tue, 31 Mar 2009 09:33:27 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.38,453,1233561600"; d="scan'208";a="677481194" Date: Tue, 31 Mar 2009 14:53:51 +0200 From: Markus Metzger To: linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com Cc: markus.t.metzger@intel.com, markus.t.metzger@gmail.com, roland@redhat.com, eranian@googlemail.com, oleg@redhat.com, juan.villacis@intel.com, ak@linux.jf.intel.com Subject: [patch 2/21] sched: add task_is_running() fucntion to sched.h Message-ID: <20090331145351.A12494@sedona.ch.intel.com> Mime-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.2.5i Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2220 Lines: 65 Add a function to query whether a task is currently running on any cpu. Signed-off-by: Markus Metzger --- Index: git-tip/include/linux/sched.h =================================================================== --- git-tip.orig/include/linux/sched.h 2009-03-30 13:31:10.000000000 +0200 +++ git-tip/include/linux/sched.h 2009-03-30 13:36:56.000000000 +0200 @@ -2280,6 +2280,7 @@ static inline void set_task_cpu(struct t #endif /* CONFIG_SMP */ +extern int task_is_running(struct task_struct *p); extern void arch_pick_mmap_layout(struct mm_struct *mm); #ifdef CONFIG_TRACING Index: git-tip/kernel/sched.c =================================================================== --- git-tip.orig/kernel/sched.c 2009-03-30 13:30:56.000000000 +0200 +++ git-tip/kernel/sched.c 2009-03-30 13:47:39.000000000 +0200 @@ -1933,6 +1933,22 @@ migrate_task(struct task_struct *p, int } /* + * Is the task currently running on any cpu? + */ +int task_is_running(struct task_struct *p) +{ + struct rq *rq; + unsigned long flags; + int running; + + rq = task_rq_lock(p, &flags); + running = task_running(rq, p); + task_rq_unlock(rq, &flags); + + return running; +} + +/* * wait_task_inactive - wait for a thread to unschedule. * * If @match_state is nonzero, it's the @p->state value just checked and --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/