From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754033AbcDVNuU (ORCPT ); Fri, 22 Apr 2016 09:50:20 -0400 Received: from foss.arm.com ([217.140.101.70]:34467 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753346AbcDVNuT (ORCPT ); Fri, 22 Apr 2016 09:50:19 -0400 Date: Fri, 22 Apr 2016 14:50:15 +0100 From: Catalin Marinas To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com, marc.zyngier@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, James Morse , Vadim.Lomovtsev@caviumnetworks.com Subject: Re: [PATCH v4 5/5] arm64: Fix behavior of maxcpus=N Message-ID: <20160422135014.GM2998@e104818-lin.cambridge.arm.com> References: <1461324335-5081-1-git-send-email-suzuki.poulose@arm.com> <1461324335-5081-6-git-send-email-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1461324335-5081-6-git-send-email-suzuki.poulose@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 22, 2016 at 12:25:35PM +0100, Suzuki K. Poulose wrote: > maxcpu=n sets the number of CPUs activated at boot time to a max of n, > but allowing the remaining CPUs to be brought up later if the user > decides to do so. However, on arm64 due to various reasons, we disallowed > hotplugging CPUs beyond n, by marking them not present. Now that > we have checks in place to make sure the hotplugged CPUs have compatible > features with system and requires no new errata, relax the restriction. > > Cc: Will Deacon > Cc: Catalin Marinas > Cc: Mark Rutland > Cc: James Morse > Signed-off-by: Suzuki K Poulose Reviewed-by: Catalin Marinas