Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755456AbbDUNTE (ORCPT ); Tue, 21 Apr 2015 09:19:04 -0400 Received: from smtprelay0074.hostedemail.com ([216.40.44.74]:59006 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755410AbbDUNTA (ORCPT ); Tue, 21 Apr 2015 09:19:00 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1539:1593:1594:1711:1730:1747:1777:1792:2393:2553:2559:2562:2910:3138:3139:3140:3141:3142:3352:3622:3865:3866:3867:3868:3871:3872:3874:5007:6117:6120:6261:7875:7901:7903:10004:10400:10848:10967:11232:11658:11914:12517:12519:12740:13069:13161:13229:13311:13357:13618:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: body74_3134a19165f59 X-Filterd-Recvd-Size: 2159 Date: Tue, 21 Apr 2015 09:18:57 -0400 From: Steven Rostedt To: Ingo Molnar Cc: "Paul E. McKenney" , Clark Williams , linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, a.p.zijlstra@chello.nl, akpm@linux-foundation.org, linux-rt-users@vger.kernel.org Subject: Re: [GIT RFC PULL rcu/urgent] Prevent Kconfig from asking pointless questions Message-ID: <20150421091857.03d2b587@gandalf.local.home> In-Reply-To: <20150421064222.GA22291@gmail.com> References: <20150418133444.GD23685@linux.vnet.ibm.com> <20150418143238.GA2337@gmail.com> <20150419020541.GA5561@linux.vnet.ibm.com> <20150420113554.598e503f@sluggy> <20150420170902.GU5561@linux.vnet.ibm.com> <20150420180107.GE24936@home.goodmis.org> <20150420180904.GA19229@gmail.com> <20150420142149.3ac58a2c@gandalf.local.home> <20150420182831.GA19510@gmail.com> <20150420143440.49e1e537@gandalf.local.home> <20150421064222.GA22291@gmail.com> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; x86_64-pc-linux-gnu) MIME-Version: 1.0 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: 977 Lines: 22 On Tue, 21 Apr 2015 08:42:23 +0200 Ingo Molnar wrote: > Note that modern scheduler policies, like SCHED_DEADLINE, get all > their policy parameters from the sched_setparam() user-space ABI, they > are not driven by sysctls. Right, and when I realized that we can do the same with chrt, I suggested using that. Clark thought that the prio of the rcu threads always went back to the hard coded value set at compile time. I looked at the code and didn't see that and then asked Paul about it. Seems chrt should work. Before my argument was based on not having any way at run time to change the rcu priorities, which I feel is bad. But if there is a way, then that should be what we tell users to use. -- Steve -- 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/