From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FBB2C433E7 for ; Tue, 20 Oct 2020 11:51:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0CE7E222C8 for ; Tue, 20 Oct 2020 11:51:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="b08buPol"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="EOmy9Sx3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393875AbgJTLvL (ORCPT ); Tue, 20 Oct 2020 07:51:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393628AbgJTLvK (ORCPT ); Tue, 20 Oct 2020 07:51:10 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C1B9C061755; Tue, 20 Oct 2020 04:51:10 -0700 (PDT) Date: Tue, 20 Oct 2020 13:51:06 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1603194667; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=9Vkq0GQGPp+/9SF0HllUGc99HNOes06ZrnYtH1JbC7I=; b=b08buPolgMx6h2xIRczwStlnv1J+oicAhhEgM9+feC9gGskAiGpJEFCIrdsOUCgPrFIrVd msHKsnLgdOFW7p8INUdZFEK9pXZyaRfop4m6D6dL/qsoOC+kdEVbPauTj6pCL8rvPD5koA ycaI2IxYbWUgiIByUrRk2hCJ1p8RKha0SuZ8GfIrdgUMskETYM5Pdjc6bR+BAe3qVa1d1p vxj4p4R+6WJznXlcURQsXK1v4oxDES2hKqWPHSwJ5V5Y0mbFJw2MX4HXjrM5wUHRHAaeiq IngvNcRZy57bx5WrtF0UOKEFZevaMc63mUfm2lKxu8mqKPysT1MWU6w7bkoLLw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1603194667; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=9Vkq0GQGPp+/9SF0HllUGc99HNOes06ZrnYtH1JbC7I=; b=EOmy9Sx3OgMfreqZmnde5PWjDVJYZMnsj9nq8tIY/ZOs+6wCp3VVMOcby9XWTjSWFy+ob6 VEOJ2NR/xS/XbADQ== From: Sebastian Andrzej Siewior To: Peter Zijlstra Cc: Christian Eggers , tglx@linutronix.de, linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: sched: system doesn't boot since "sched: Add new migrate_disable() implementation" Message-ID: <20201020115106.n474gls6oxfy5im4@linutronix.de> References: <1654655.1jrfHnk7pZ@n95hx1g2> <20201019150935.koqbk57dmahhomdc@linutronix.de> <20201020113009.GR2628@hirez.programming.kicks-ass.net> <20201020113828.fv7ui4h3gkrcpqoc@linutronix.de> <20201020114137.GS2628@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20201020114137.GS2628@hirez.programming.kicks-ass.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-10-20 13:41:37 [+0200], Peter Zijlstra wrote: > Right, but this patch set doesn't include the lazy preemption stuff, and > given the 'fun' Valentin and me are still having with it, I'd like to > keep it like that. > > But yes, that might warrant a slightly less NOP implementation. Uh. Looking at the actual implementation we don't look at the mg-counter but have preempt_lazy_disable() for that. Let me sync your bits then. Thanks. Sebastian