Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp327464pxb; Thu, 25 Feb 2021 03:46:39 -0800 (PST) X-Google-Smtp-Source: ABdhPJxGAyH/NHCWyzlmnsGHfoQDt6lIzRCCfbGC6BqQMU6izYex8q9qnOxqv3M/rL+8rz5ZQiE4 X-Received: by 2002:aa7:c150:: with SMTP id r16mr2379218edp.96.1614253599608; Thu, 25 Feb 2021 03:46:39 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1614253599; cv=none; d=google.com; s=arc-20160816; b=k0sBu1QlrAcEQT48zRAW36HLGntlDEx8b6M0GKNUIMT1l0UwZyPacNCgTamJovnNCL Tz+Fg690//H/wUFAhShjUb9ptXZa75YaoC2vSOnHbjMjPJmRNkfFfohDv80Qw9r75IBp 8rOeo1RnWuOmFpj+4f3F9dgQeVY7J7aAekeys1XGyG4Jx9o3x7Jk2ufD4gvTRojJ+Fco 2SOFU9a/xbXLOLQMNfEKp7ZLJcY7wQZ0e0xnyAHXpNBRk8KlSyRgb9ZnW3q9Y1J/ctnf 3Z/R0H2KPs5BUKmNshsUI2qE1o/bfg3nXUpuPoGoPCtrS4uut1bWke6A3jXI2YlgtW5l 4dew== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:user-agent :references:in-reply-to:subject:cc:to:from; bh=Tx/kNuvX5VXHYDB7jUrbSie0q1w4VbCkxJgR6ABP500=; b=Rk05180FpfLJl8NdokAa2v1ttfYX5pOIV2ABVXxM86PVnuXtoY+ZjLhNTEj07tA5dV TLKVYvV80U0zgnPLgJX0EwhAoaBr2dVq5qn8vWtGhPKpWctJgrIjASc0XMjVU3cnAc45 9IWkcX2WJ9Y9ewVwCinzhaVMhORLv689rraWR1iPjH4D9qgzDTH4lIVeFhQwVnxeLE6o 9LOk+WNDEhYZZ2ZCl89wPhWZQ7YwvRs+JTZAeFTpfWiD/JSpUZTHXLoATMG5yIj6WUz0 R323h2w2LbzfJLZcx58165q4PNNZOWS0zvEGhlz7b7cKTUlhvn+7S9unUh0MX274RoHK z7WQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id y1si3225566edp.72.2021.02.25.03.46.17; Thu, 25 Feb 2021 03:46:39 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234106AbhBYLNE (ORCPT + 99 others); Thu, 25 Feb 2021 06:13:04 -0500 Received: from foss.arm.com ([217.140.110.172]:54228 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233501AbhBYLMC (ORCPT ); Thu, 25 Feb 2021 06:12:02 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 69B55113E; Thu, 25 Feb 2021 03:11:17 -0800 (PST) Received: from e113632-lin (e113632-lin.cambridge.arm.com [10.1.194.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4E5FD3F73D; Thu, 25 Feb 2021 03:11:16 -0800 (PST) From: Valentin Schneider To: Peter Zijlstra Cc: Ingo Molnar , Thomas Gleixner , Vincent Guittot , Mel Gorman , Dietmar Eggemann , linux-kernel@vger.kernel.org, Andi Kleen Subject: Re: [PATCH 6/6] sched: Simplify set_affinity_pending refcounts In-Reply-To: References: <20210224122439.176543586@infradead.org> <20210224131355.724130207@infradead.org> User-Agent: Notmuch/0.21 (http://notmuchmail.org) Emacs/26.3 (x86_64-pc-linux-gnu) Date: Thu, 25 Feb 2021 11:11:13 +0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/02/21 10:27, Peter Zijlstra wrote: > On Wed, Feb 24, 2021 at 05:59:01PM +0000, Valentin Schneider wrote: > >> Your change reinstores the "triple SCA" pattern, where a stopper can run >> with arg->pending && arg->pending != p->migration_pending, which I was >> kinda happy to see go away... > > Right, fair enough. Any workload that can tell the difference is doing > it wrong anyway :-) > > OK, I've munged your two patches together into the below. > Thanks! I haven't found much else to say on the series after having slept on it, so feel free to add: Reviewed-by: Valentin Schneider to the rest. I'll go see about testing it in some way.