From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 3995A282 for ; Tue, 13 Oct 2015 22:42:01 +0000 (UTC) Received: from mail-ob0-f176.google.com (mail-ob0-f176.google.com [209.85.214.176]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 8CEAF11D for ; Tue, 13 Oct 2015 22:42:00 +0000 (UTC) Received: by obbrx8 with SMTP id rx8so25952695obb.3 for ; Tue, 13 Oct 2015 15:42:00 -0700 (PDT) MIME-Version: 1.0 Sender: mcgrof@gmail.com In-Reply-To: <1747675.QSGVOD93O5@vostro.rjw.lan> References: <20151013124230.1a082d28@gandalf.local.home> <2823307.1o7LnhjveU@vostro.rjw.lan> <20151013221941.GF14464@wotan.suse.de> <1747675.QSGVOD93O5@vostro.rjw.lan> From: "Luis R. Rodriguez" Date: Tue, 13 Oct 2015 15:41:40 -0700 Message-ID: To: "Rafael J. Wysocki" Content-Type: text/plain; charset=UTF-8 Cc: ksummit-discuss@lists.linuxfoundation.org Subject: Re: [Ksummit-discuss] [TECH TOPIC] Mainlining PREEMPT_RT List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Oct 13, 2015 at 4:04 PM, Rafael J. Wysocki wrote: > On Wednesday, October 14, 2015 12:19:41 AM Luis R. Rodriguez wrote: >> On Wed, Oct 14, 2015 at 12:40:10AM +0200, Rafael J. Wysocki wrote: >> > On Tuesday, October 13, 2015 12:42:30 PM Steven Rostedt wrote: >> > > >> > > Now that it was announced in Dublin last week that mainlining >> > > PREEMPT_RT has funding, I would like to propose a tech topic to discuss >> > > what is needed to be done in the near future. >> > > >> > > Thomas Gleixner and his minions will be doing the brunt of the work, >> > > but there's issues that need to be addressed with the rest of the >> > > kernel. The various topics would include: >> > > >> > > CPU hotplug >> > > preempt_disable and local_irq_disable annotations >> > > new timer_wheel implementation >> > > simple waitqueues >> > > trylock boosting >> > > >> > > Several of the Real Time developers will be present at kernel summit. I >> > > think this would be a great opportunity to have them be able to sit >> > > down together and discuss the remaining issues. >> > >> > Well, that's not limited to the RT developers even. >> > >> > Good topic. >> >> How much of this is the above topics Vs lack of good semantics in general, or >> code which needs love / good design? I ask as we have a few 'semantic' >> discussions, and I have a feeling there might be overlap. > > At this time it is not particularly clear to me how much overlap there's going > to be, if any. > > And if there is overlap, we should be able to notice that and avoid > discussing the same thing twice, perhaps? Sounds good. Luis