From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:770:15f::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 37ED9B70CC for ; Sun, 17 Jun 2012 03:31:20 +1000 (EST) Message-ID: <1339867858.15222.12.camel@twins> Subject: Re: [RFC PATCH 09/10] POWERPC: smp: remove call to ipi_call_lock()/ipi_call_unlock() From: Peter Zijlstra To: paulmck@linux.vnet.ibm.com Date: Sat, 16 Jun 2012 19:30:58 +0200 In-Reply-To: <20120616163219.GI2420@linux.vnet.ibm.com> References: <1338275765-3217-1-git-send-email-yong.zhang0@gmail.com> <1338275765-3217-10-git-send-email-yong.zhang0@gmail.com> <20120616163219.GI2420@linux.vnet.ibm.com> Content-Type: text/plain; charset="ISO-8859-1" Mime-Version: 1.0 Cc: axboe@kernel.dk, sshtylyov@mvista.com, nikunj@linux.vnet.ibm.com, david.daney@cavium.com, linux-kernel@vger.kernel.org, ralf@linux-mips.org, akpm@linux-foundation.org, Yong Zhang , Paul Mackerras , srivatsa.bhat@linux.vnet.ibm.com, tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sat, 2012-06-16 at 09:32 -0700, Paul E. McKenney wrote: > However, there is an effort to get rid of stop_machine() from the > CPU-down path... So something else will be needed.=20 Elsewhere in this thread I mentioned we could do a synchronize_sched(). I think that covers most of what stop-machine is doing these days.