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=-12.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 1E2FFC433E0 for ; Wed, 6 Jan 2021 02:21:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D467022CE3 for ; Wed, 6 Jan 2021 02:21:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726234AbhAFCV5 (ORCPT ); Tue, 5 Jan 2021 21:21:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725978AbhAFCV4 (ORCPT ); Tue, 5 Jan 2021 21:21:56 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98F64C061387 for ; Tue, 5 Jan 2021 18:21:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:MIME-Version:Date:Message-ID:From:References:To:Subject:Sender: Reply-To:Cc:Content-ID:Content-Description; bh=DwXo5OtthLO/ovJHBO2OaqlsvlKPhfS9FzWXNA2R03w=; b=NJ8lsE016yMA0O3c6CI+fNdOHV 16fKw+Q3tCvv1IzaRiOJL5IQZ7UmYqB8ehMKyXJXOvuykJ9xrrR1KhRxTJyVmE9zB0yCxScRdGIlI xyJ+HxIzO10aSJ0hy3J4l/0hOAgO+gBzx5+GaNrRgH5hNM69MtGgaIlAF63nPVaXXavOTP/DWXeoC 0TvHOh+3Jn8TZzYj3gDjnl40fLIYXN+j5Fuw91r5XE15GrJvizpOYGq61odHCwa+E5iSsi65EH4nP gFSaX33WskvgxxXLEFxBuPzn4T+VZs+80Y5WsPrl+kg12+xOlSX1S5KQnYK1rcG1i305TqM/r1rUg dTemnIJQ==; Received: from [2601:1c0:6280:3f0::64ea] by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1kwyRI-001uc0-QK; Wed, 06 Jan 2021 02:21:03 +0000 Subject: Re: [PATCH 1/1] arm64: make section size configurable for memory hotplug To: Sudarshan Rajagopalan , akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <66f79b0c06602c22df4da8ff4a5c2b97c9275250.1609895500.git.sudaraja@codeaurora.org> From: Randy Dunlap Message-ID: <1c4613bc-56e9-de99-e9de-4313b4aa88a2@infradead.org> Date: Tue, 5 Jan 2021 18:20:40 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <66f79b0c06602c22df4da8ff4a5c2b97c9275250.1609895500.git.sudaraja@codeaurora.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/5/21 5:28 PM, Sudarshan Rajagopalan wrote: > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 6d232837cbee..34124eee65da 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -294,6 +294,17 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE > config SMP > def_bool y > > +config HOTPLUG_SIZE_BITS > + int "Memory hotplug block size(29 => 512MB 30 => 1GB)" block size (29 => 512MB, 30 => 1GB)" > + depends on SPARSEMEM > + depends on MEMORY_HOTPLUG > + range 28 30 > + default 30 > + help > + Selects granularity of hotplug memory. Block size for > + memory hotplug is represent as a power of 2. represented > + If unsure, stick with default value. and all of the help text should be indented with 1 tab + 2 spaces. thanks. -- ~Randy