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=-5.8 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 88056C43460 for ; Mon, 17 May 2021 19:43:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6398E60FF3 for ; Mon, 17 May 2021 19:43:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235152AbhEQTpO (ORCPT ); Mon, 17 May 2021 15:45:14 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:54724 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234820AbhEQTpM (ORCPT ); Mon, 17 May 2021 15:45:12 -0400 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1621280634; 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=TN3eCy4K3v+FJgfvmzzc0Rr5EDmqsacmFrs0RMJDVzU=; b=GMYgkfTvzOMMSYG9Z5Kji7SNPPQjvR1SKqkMheQ6jKoITXDpRcEdvARxgbXnKTWYkntFHj BUIU7NV37f613bfJ4PeoRd7NpKwCWOBtaLEzt8p7y8nZCm/Ifltx+SkLgVpeVyW2hGOtHW PfYX3ELXMcstAsw3RMrFuK8ZrhC1PrkdnJCiscbgMyIQ5UImP6GfQucc89ZNoPa6z8jJui FimZKiy4fnQJ/X8Y4hOJsLqOmLCIj3Yb9S/polhLWIj8LTk91yjIDmtqsfq1eplvo/qY4K EbjLDncfAPa28ZTl+7yPnazbGGM+iGGsYbJvYsu2ov+ftPq+wCMJfeRaz+D/nA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1621280634; 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=TN3eCy4K3v+FJgfvmzzc0Rr5EDmqsacmFrs0RMJDVzU=; b=3ZyX7mXAoc/FzM/YFz4cWDS/4vd5Id0khZi3a2JYcqlfmTT9UfJfYFndAYNdZJb4+iWbnS 41OIcwEdsCM+biBg== To: Robin Murphy , Nitesh Lal , Jesse Brandeburg , "frederic\@kernel.org" , "juri.lelli\@redhat.com" , Marcelo Tosatti Cc: Ingo Molnar , linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, jbrandeb@kernel.org, Alex Belits , "linux-api\@vger.kernel.org" , "bhelgaas\@google.com" , "linux-pci\@vger.kernel.org" , "rostedt\@goodmis.org" , "peterz\@infradead.org" , "davem\@davemloft.net" , "akpm\@linux-foundation.org" , "sfr\@canb.auug.org.au" , "stephen\@networkplumber.org" , "rppt\@linux.vnet.ibm.com" , "jinyuqi\@huawei.com" , "zhangshaokun\@hisilicon.com" , netdev@vger.kernel.org, chris.friesen@windriver.com, Marc Zyngier Subject: Re: [PATCH tip:irq/core v1] genirq: remove auto-set of the mask when setting the hint In-Reply-To: <874kf1faac.ffs@nanos.tec.linutronix.de> References: <20210501021832.743094-1-jesse.brandeburg@intel.com> <16d8ca67-30c6-bb4b-8946-79de8629156e@arm.com> <20210504092340.00006c61@intel.com> <87sg2lz0zz.ffs@nanos.tec.linutronix.de> <874kf1faac.ffs@nanos.tec.linutronix.de> Date: Mon, 17 May 2021 21:43:54 +0200 Message-ID: <871ra5f8n9.ffs@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 17 2021 at 21:08, Thomas Gleixner wrote: > On Mon, May 17 2021 at 19:50, Robin Murphy wrote: >> some of the callers in other subsystems appear to *expect* it to set >> the underlying affinity as well, but whether any of those added within >> the last 6 years represent a functional dependency rather than just a >> performance concern I don't know. > > Sigh. Let me do yet another tree wide audit... It's clearly only the perf muck which has a functional dependency. None of the other usage sites has IRQF_NOBALANCING set which clearly makes this a hint because user space can freely muck with the affinity. Thanks, tglx