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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 11962C433DB for ; Tue, 23 Mar 2021 10:41:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3623619B7 for ; Tue, 23 Mar 2021 10:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230063AbhCWKkl (ORCPT ); Tue, 23 Mar 2021 06:40:41 -0400 Received: from mx2.suse.de ([195.135.220.15]:36406 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbhCWKkd (ORCPT ); Tue, 23 Mar 2021 06:40:33 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1616496032; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=j6VJBOqPp1IrCTH90OFeWiL35R+bOlqcNiPTvvstMhI=; b=T5gkMXkqrikPtYfoXNhJpidht574S/HQwGQ1absbWzeZSegz3kLGfQHCP6DdMf6DSxRdF4 U6qaSp6nrENLxnFzbGj5VEoCQ2qn7Xs+mzvJnoL5kZFQjOcjihj1lCPUmktRd2EzShQ0VA yKbrRyCAxHIhRMpNs45qpmOPwo5wjao= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id EA070AC3E; Tue, 23 Mar 2021 10:40:31 +0000 (UTC) Date: Tue, 23 Mar 2021 11:40:31 +0100 From: Michal Hocko To: Oscar Salvador Cc: Andrew Morton , David Hildenbrand , Anshuman Khandual , Vlastimil Babka , Pavel Tatashin , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 2/5] acpi,memhotplug: Enable MHP_MEMMAP_ON_MEMORY when supported Message-ID: References: <20210319092635.6214-1-osalvador@suse.de> <20210319092635.6214-3-osalvador@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210319092635.6214-3-osalvador@suse.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri 19-03-21 10:26:32, Oscar Salvador wrote: > Let the caller check whether it can pass MHP_MEMMAP_ON_MEMORY by > checking mhp_supports_memmap_on_memory(). > MHP_MEMMAP_ON_MEMORY can only be set in case > ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE is enabled, the architecture supports > altmap, and the range to be added spans a single memory block. > > Signed-off-by: Oscar Salvador > Reviewed-by: David Hildenbrand Acked-by: Michal Hocko > --- > drivers/acpi/acpi_memhotplug.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c > index b02fd51e5589..8cc195c4c861 100644 > --- a/drivers/acpi/acpi_memhotplug.c > +++ b/drivers/acpi/acpi_memhotplug.c > @@ -171,6 +171,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) > acpi_handle handle = mem_device->device->handle; > int result, num_enabled = 0; > struct acpi_memory_info *info; > + mhp_t mhp_flags = MHP_NONE; > int node; > > node = acpi_get_node(handle); > @@ -194,8 +195,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) > if (node < 0) > node = memory_add_physaddr_to_nid(info->start_addr); > > + if (mhp_supports_memmap_on_memory(info->length)) > + mhp_flags |= MHP_MEMMAP_ON_MEMORY; > result = __add_memory(node, info->start_addr, info->length, > - MHP_NONE); > + mhp_flags); > > /* > * If the memory block has been used by the kernel, add_memory() > -- > 2.16.3 -- Michal Hocko SUSE Labs