From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754799AbaEHKtd (ORCPT ); Thu, 8 May 2014 06:49:33 -0400 Received: from terminus.zytor.com ([198.137.202.10]:33410 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754002AbaEHKrE (ORCPT ); Thu, 8 May 2014 06:47:04 -0400 Date: Thu, 8 May 2014 03:46:27 -0700 From: tip-bot for Peter Zijlstra Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, torvalds@linux-foundation.org, peterz@infradead.org, cmetcalf@tilera.com, luto@amacapital.net, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, peterz@infradead.org, cmetcalf@tilera.com, luto@amacapital.net, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched/idle, tile: Switch from TS_POLLING to TIF_POLLING_NRFLAG Git-Commit-ID: b3a8cb18ce284b5c47517b681c42fcb9d8a99992 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: b3a8cb18ce284b5c47517b681c42fcb9d8a99992 Gitweb: http://git.kernel.org/tip/b3a8cb18ce284b5c47517b681c42fcb9d8a99992 Author: Peter Zijlstra AuthorDate: Fri, 11 Apr 2014 09:59:13 +0200 Committer: Ingo Molnar CommitDate: Thu, 8 May 2014 09:16:54 +0200 sched/idle, tile: Switch from TS_POLLING to TIF_POLLING_NRFLAG Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word. This will allow us, using fetch_or(), to both set NEED_RESCHED and check for POLLING_NRFLAG in a single operation and avoid pointless wakeups. Changing from the non-atomic thread_info::status flags to the atomic thread_info::flags shouldn't be a big issue since most polling state changes were followed/preceded by a full memory barrier anyway. Signed-off-by: Peter Zijlstra Acked-by: Chris Metcalf Cc: Andy Lutomirski Cc: Chris Metcalf Cc: Linus Torvalds Link: http://lkml.kernel.org/n/tip-35zzwlvwr7cp8xj196y10yyx@git.kernel.org Signed-off-by: Ingo Molnar --- arch/tile/include/asm/thread_info.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h index 729aa10..d767ff9 100644 --- a/arch/tile/include/asm/thread_info.h +++ b/arch/tile/include/asm/thread_info.h @@ -129,6 +129,7 @@ extern void _cpu_idle(void); #define TIF_MEMDIE 7 /* OOM killer at work */ #define TIF_NOTIFY_RESUME 8 /* callback before returning to user */ #define TIF_SYSCALL_TRACEPOINT 9 /* syscall tracepoint instrumentation */ +#define TIF_POLLING_NRFLAG 10 /* idle is polling for TIF_NEED_RESCHED */ #define _TIF_SIGPENDING (1<