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 DF10EC433E6 for ; Sat, 6 Feb 2021 03:52:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD7FA64E0F for ; Sat, 6 Feb 2021 03:52:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232422AbhBFDvd (ORCPT ); Fri, 5 Feb 2021 22:51:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230525AbhBFCx2 (ORCPT ); Fri, 5 Feb 2021 21:53:28 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAD08C03BFFC; Fri, 5 Feb 2021 14:27:01 -0800 (PST) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1612564020; 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=VadslTTd+2N1rTvdy4wdiu4OS+/fi59Fn5i0loWcZCI=; b=cvaRnSQfaldfyTZrh9hwF4XpLuxM42vLwC92tAfeOnixBjonYDcx61OsV9PTWWQ1ZHB26y aGbDu6J4PkF0/+xJwYytkbbisJwoJowJeNEsoRhDo1wBvWYNL5ENg8ydDZ9NN//SiSw3z/ iWGpSWN4IJtBn1u7/EQhn8Ql9Bd7TpVYeo1dgESYtrgV0bO8yhpCGha4pwktRNCNt1aS6l kujYc9is12XLVgHf+LhdQeASkxkF5vJPqb88MBlNd8dvfYb27HQ82/lt+Jz0kxGhNn5C12 M6x+8u/bF7t5E18DsC/v+iXeDiOUbaj0sQpiCc9b5RCt/6tbOnevYngEvUzN0Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1612564020; 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=VadslTTd+2N1rTvdy4wdiu4OS+/fi59Fn5i0loWcZCI=; b=Vu8aiJ5kKikjvjrDFS2pX1/kUhU60dKVlhHqMlfKorK2VmvnQ6tvI+jqLJICrsVeVgxZ24 JU7asqv0T7JfaMBA== To: Nitesh Narayan Lal , Marcelo Tosatti Cc: Robin Murphy , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, frederic@kernel.org, juri.lelli@redhat.com, abelits@marvell.com, bhelgaas@google.com, linux-pci@vger.kernel.org, rostedt@goodmis.org, mingo@kernel.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 Subject: Re: [Patch v4 1/3] lib: Restrict cpumask_local_spread to houskeeping CPUs In-Reply-To: <87y2g26tnt.fsf@nanos.tec.linutronix.de> References: <20200625223443.2684-1-nitesh@redhat.com> <20200625223443.2684-2-nitesh@redhat.com> <3e9ce666-c9cd-391b-52b6-3471fe2be2e6@arm.com> <20210127121939.GA54725@fuller.cnet> <87r1m5can2.fsf@nanos.tec.linutronix.de> <20210128165903.GB38339@fuller.cnet> <87h7n0de5a.fsf@nanos.tec.linutronix.de> <20210204181546.GA30113@fuller.cnet> <20210204190647.GA32868@fuller.cnet> <87y2g26tnt.fsf@nanos.tec.linutronix.de> Date: Fri, 05 Feb 2021 23:26:59 +0100 Message-ID: <87v9b66tho.fsf@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 Fri, Feb 05 2021 at 23:23, Thomas Gleixner wrote: > On Thu, Feb 04 2021 at 14:17, Nitesh Narayan Lal wrote: >> On 2/4/21 2:06 PM, Marcelo Tosatti wrote: >>>>> How about adding a new flag for isolcpus instead? >>>>> >>>> Do you mean a flag based on which we can switch the affinity mask to >>>> housekeeping for all the devices at the time of IRQ distribution? >>> Yes a new flag for isolcpus. HK_FLAG_IRQ_SPREAD or some better name. >> >> Does sounds like a nice idea to explore, lets see what Thomas thinks about it. <.SNIP.> > So I'm going to revert this commit because it _IS_ broken _AND_ useless > and does not solve anything it claims to solve. And no. HK_FLAG_IRQ_SPREAD is not going to solve anything either. Thanks, tglx