Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24672C433F5 for ; Wed, 15 Dec 2021 07:27:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240546AbhLOH1u (ORCPT ); Wed, 15 Dec 2021 02:27:50 -0500 Received: from verein.lst.de ([213.95.11.211]:55377 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240524AbhLOH1s (ORCPT ); Wed, 15 Dec 2021 02:27:48 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 16DD568AFE; Wed, 15 Dec 2021 08:27:45 +0100 (CET) Date: Wed, 15 Dec 2021 08:27:44 +0100 From: Christoph Hellwig To: john.p.donnelly@oracle.com Cc: Christoph Hellwig , Baoquan He , linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, cl@linux.com, kexec@lists.infradead.org, stable@vger.kernel.org, Pekka Enberg , David Rientjes , Joonsoo Kim , Vlastimil Babka Subject: Re: [PATCH v3 5/5] mm/slub: do not create dma-kmalloc if no managed pages in DMA zone Message-ID: <20211215072744.GB3010@lst.de> References: <20211213122712.23805-1-bhe@redhat.com> <20211213122712.23805-6-bhe@redhat.com> <20211214163124.GA21762@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 14, 2021 at 11:07:34AM -0600, john.p.donnelly@oracle.com wrote: > Is CONFIG_ZONE_DMA even needed anymore in x86_64 ? Yes. There are still plenty of addressing challenged devices, mostly ISA-like but also a few PCI/PCIe ones.