From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: Does anyone use CONFIG_TINY_PREEMPT_RCU? Date: Tue, 13 Nov 2012 13:20:34 -0800 Message-ID: <20121113212034.GD2489@linux.vnet.ibm.com> References: <20121113004906.GA10557@linux.vnet.ibm.com> <201211132122.30259.tim01@vlsi.informatik.tu-darmstadt.de> Reply-To: paulmck@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com, sbw@mit.edu, patches@linaro.org To: Tim Sander Return-path: Received: from e39.co.us.ibm.com ([32.97.110.160]:58353 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751469Ab2KMV2X (ORCPT ); Tue, 13 Nov 2012 16:28:23 -0500 Received: from /spool/local by e39.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 13 Nov 2012 14:28:23 -0700 Content-Disposition: inline In-Reply-To: <201211132122.30259.tim01@vlsi.informatik.tu-darmstadt.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Tue, Nov 13, 2012 at 09:22:29PM +0100, Tim Sander wrote: > Hi Paul > > I know of people using TINY_RCU, TREE_RCU, and TREE_PREEMPT_RCU, but I > > have not heard of anyone using TINY_PREEMPT_RCU for whom TREE_PREEMPT_RCU > > was not a viable option (in contrast, the people running Linux on > > tiny-memmory systems typically use TINY_RCU). Of course, if no one > > really needs it, the proper thing to do is to remove it. > > > > So, if you need TINY_PREEMPT_RCU, please let me know. Otherwise, I will > > remove it, probably in the 3.9 timeframe. > I am using TINY_PREEMPT_RCU on the i.mx35 platform. I am currently on 3.4-rt > since the 3.6 compile failed due to for my config? Some strange device tree > stuff which i haven't had the time to figure out why. OK, how much memory does your device have? Thanx, Paul