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=-4.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3A552C4338F for ; Wed, 18 Aug 2021 11:08:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0863761056 for ; Wed, 18 Aug 2021 11:08:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0863761056 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MQ/q2aRKn0lVjPtnfvjC7OOJF+N+vvWTKhfkoplOAOI=; b=GoDKqn42kIzY+c pvf0HJMsPZFuM9fgcpfVuVkLDnv7/VxRFg4Vx9agAYaqJw0NrGCNkPHoHK85exKk7nIfZ8xj3iw5U irqJyXO33gg7eO9+mj+tfzEKK9O7fpL8u8NrQZK5+ZyHAboeKKZrmIYAFCvQtxYWxfLKzjJ2w5Ygg IVh1Ada8hlPYK+aFPMg3lMRQGycc5hdoi9tPa4efJWhPxZZ6KcrzmLOGkRsc2W/G4mV3r4z0Qlton M5KJJ3B32M2fX0gCH/OG6MPt2Gd/5Da4JELH7YM4GG7SGhGiPdp9WtsKQv0aJiNPMew5CwaSPOhpm bttQe3l08woCT8kEWOLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGJPA-005Hax-KI; Wed, 18 Aug 2021 11:06:44 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGJP8-005HaY-S6 for linux-arm-kernel@bombadil.infradead.org; Wed, 18 Aug 2021 11:06:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=xF3XSQocGKr3XFWdPGOP9gXsahAr6PzRo/gjqi7SrQw=; b=elMK4wMFZCS7zOtF3Kqr6Qx0Ts BvtKhauM9WXNcWGqt3xyFwwLDMmg90XOftPK1TKxNZ0ElZqghYwMSu3VOshfKq4mJu1NEJYfOIlYP 8cerDUID75lFIm370aWtQuziRuBEoaeDNezJSUJel6Yl3VVLphnSA+Rd20hQ/ylzHco+tr15iyuwt 7OgloetCQ4m6OvROCo+b4zZLTBFME+nvxfRaOMPCK6tmOmz4n2Ro40g9DgtqcHiugbFqYN1GBXPkD 52RPR8u0bGSmYe20+e/zG6OCtyDULgROSbjweT1C1NdTWbBzQ/+ZYma2siK9FR6AMQmH2Nx0WL2if cDwJNvXg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mGJOb-003k4v-97; Wed, 18 Aug 2021 11:06:19 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 859E53012AD; Wed, 18 Aug 2021 13:06:08 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 6CF20200FBAE0; Wed, 18 Aug 2021 13:06:08 +0200 (CEST) Date: Wed, 18 Aug 2021 13:06:08 +0200 From: Peter Zijlstra To: Will Deacon Cc: linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Catalin Marinas , Marc Zyngier , Greg Kroah-Hartman , Morten Rasmussen , Qais Yousef , Suren Baghdasaryan , Quentin Perret , Tejun Heo , Johannes Weiner , Ingo Molnar , Juri Lelli , Vincent Guittot , "Rafael J. Wysocki" , Dietmar Eggemann , Daniel Bristot de Oliveira , Valentin Schneider , Mark Rutland , kernel-team@android.com Subject: Re: [PATCH v11 08/16] sched: Allow task CPU affinity to be restricted on asymmetric systems Message-ID: References: <20210730112443.23245-1-will@kernel.org> <20210730112443.23245-9-will@kernel.org> <20210818104227.GA13828@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210818104227.GA13828@willie-the-truck> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Aug 18, 2021 at 11:42:28AM +0100, Will Deacon wrote: > Ah, sorry. I didn't realise you couldn't _free_ with a raw lock held in RT. > Is there somewhere I can read up on that? It's because the allocators use spinlock_t, which cannot nest inside raw_spinlock_t. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel