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=-15.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 B5851C2B9F7 for ; Tue, 25 May 2021 02:23:32 +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 7CE1C613EC for ; Tue, 25 May 2021 02:23:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7CE1C613EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@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=wp4zPsegvvlriXafI0jYtbzXMLfgGljb0xBBOO76FVs=; b=BPLQmZ9kM275ZW gCRL8Nkx7ATysW55tNJwpG1jGeNIJxVO1N92uRWzRuOSjo4dEmZYk+kHj00jSY14RpxUmDsCgwwRi AuNZBnY0yFa4FQsWcC3ns7IUgNWhyFpEnDyLnBnHX7EIEV4V0vWaNG+rnVeoSbkw5Q4v5JlRYjqXk 2N+PaeADuRUMuuK7+fmADVEoZsv9ZG+X0bdqVp+xG4QAaWot6vz4NJyvIbo4izOM6uHLElsZYnWqe ZTidJbbDwrlLBhkXVNfHdXxZ20+GtOdRSr1dgTBA8TY5SQAXA8+9PU94kpRIOX6rOWKeMzErO8C5y CjTR6bmviDb7P/kZbDiA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1llMhP-002tlR-8C; Tue, 25 May 2021 02:21:40 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1llIP6-001zRK-UU for linux-arm-kernel@lists.infradead.org; Mon, 24 May 2021 21:46:30 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 80D7B6140F; Mon, 24 May 2021 21:46:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621892788; bh=pIqcwhnobnjNtorg38viD7Ev04FdWPKbGKaiT70sphw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sqlUf1coLr/eocDF0EyjRwzf6YJvk2jL0KLJC3/80LIoV1iV/SHgWo0LJElWlXM6p VkYfo6o3495XQ0gUwyw4FeIYHKnKH06ZwUJvJH7wh56Ou/GmgW45m6EXuysQLL2jaR 5SLgBzFlcTuMfUSW7GFsCpCsr9GJJM5VBUQgPhhsRwFZQRBcB6Zg9Xce88IXlFtLtx c5ivaG7kcgdQA9KAkhnTxFDg01DNFKOpPwuQXMQ1xT3+yejxO0JTIfyyE6fYhQFom/ rLs1KaAhZnJroH/ZPgGFxVwCDdZrAX7MU0Hfp9TEY6MWdJ/XQLVQ6Ef8vwN6OUEg+e pw/HP7TqPYgfw== Date: Mon, 24 May 2021 22:46:22 +0100 From: Will Deacon To: Qais Yousef Cc: linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Catalin Marinas , Marc Zyngier , Greg Kroah-Hartman , Peter Zijlstra , Morten Rasmussen , Suren Baghdasaryan , Quentin Perret , Tejun Heo , Li Zefan , Johannes Weiner , Ingo Molnar , Juri Lelli , Vincent Guittot , "Rafael J. Wysocki" , kernel-team@android.com Subject: Re: [PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support Message-ID: <20210524214622.GI15545@willie-the-truck> References: <20210518094725.7701-1-will@kernel.org> <20210518094725.7701-22-will@kernel.org> <20210521173721.untjfglvxja6v6ot@e107158-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210521173721.untjfglvxja6v6ot@e107158-lin.cambridge.arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210524_144629_058391_F67CA299 X-CRM114-Status: GOOD ( 19.59 ) 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 Fri, May 21, 2021 at 06:37:21PM +0100, Qais Yousef wrote: > On 05/18/21 10:47, Will Deacon wrote: > > Document support for running 32-bit tasks on asymmetric 32-bit systems > > and its impact on the user ABI when enabled. > > > > Signed-off-by: Will Deacon > > --- > > .../admin-guide/kernel-parameters.txt | 3 + > > Documentation/arm64/asymmetric-32bit.rst | 149 ++++++++++++++++++ > > Documentation/arm64/index.rst | 1 + > > 3 files changed, 153 insertions(+) > > create mode 100644 Documentation/arm64/asymmetric-32bit.rst > > > > [...] > > > +Cpusets > > +------- > > + > > +The affinity of a 32-bit task may include CPUs that are not explicitly > > +allowed by the cpuset to which it is attached. This can occur as a > > +result of the following two situations: > > + > > + - A 64-bit task attached to a cpuset which allows only 64-bit CPUs > > + executes a 32-bit program. > > + > > + - All of the 32-bit-capable CPUs allowed by a cpuset containing a > > + 32-bit task are offlined. > > + > > +In both of these cases, the new affinity is calculated according to step > > +(2) of the process described in `execve(2)`_ and the cpuset hierarchy is > > +unchanged irrespective of the cgroup version. > > nit: Should we call out that we're breaking cpuset-v1 behavior? Don't feel > strongly about it. I think the text is pretty clear that the new behaviour documented here applies to cpuset-v1 and I wouldn't say we're breaking anything as we're not changing any of the existing behaviours. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel