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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 DCEA9CA9EAF for ; Mon, 21 Oct 2019 17:56:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB1702086D for ; Mon, 21 Oct 2019 17:56:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728162AbfJURz3 (ORCPT ); Mon, 21 Oct 2019 13:55:29 -0400 Received: from mx2.suse.de ([195.135.220.15]:44906 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726289AbfJURz2 (ORCPT ); Mon, 21 Oct 2019 13:55:28 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0BA09AC40; Mon, 21 Oct 2019 17:55:27 +0000 (UTC) Message-ID: <9208de061fe2b9ee7b74206b3cd52cc116e43ac0.camel@suse.de> Subject: Re: [PATCH v6 3/4] arm64: use both ZONE_DMA and ZONE_DMA32 From: Nicolas Saenz Julienne To: Qian Cai Cc: f.fainelli@gmail.com, mbrugger@suse.com, marc.zyngier@arm.com, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Rob Herring , linux-rpi-kernel@lists.infradead.org, m.szyprowski@samsung.com, Robin Murphy , phill@raspberrypi.org, will@kernel.org, Christoph Hellwig , linux-arm-kernel@lists.infradead.org, wahrenst@gmx.net Date: Mon, 21 Oct 2019 19:55:25 +0200 In-Reply-To: References: <6703f8dab4a21fe4e1049f8f224502e1733bf72c.camel@suse.de> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-HpXuUqy8wDt6AUMeP1G+" User-Agent: Evolution 3.32.4 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-HpXuUqy8wDt6AUMeP1G+ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2019-10-21 at 13:25 -0400, Qian Cai wrote: > > On Oct 21, 2019, at 1:01 PM, Nicolas Saenz Julienne > > wrote: > >=20 > > Could you enable CMA debugging to see if anything interesting comes out= of > > it. >=20 > I did but nothing interesting came out. Did you use the same config I gav= e? Yes, aside from enabling ZONE_DMA. > Also, it has those cmdline. > > page_poison=3Don page_owner=3Don numa_balancing=3Denable \ > systemd.unified_cgroup_hierarchy=3D1 debug_guardpage_minorder=3D1 \ > page_alloc.shuffle=3D1 No luck, still works for me even after adding those extra flags. IIRC most = of them (if not all) are not even parsed by the time CMA is configured. So, can you confirm the zones setup you're seeing is similar to this one: [ 0.000000][ T0] Zone ranges: [ 0.000000][ T0] DMA [mem 0x00000000802f0000-0x00000000bffffff= f] [ 0.000000][ T0] DMA32 [mem 0x00000000c0000000-0x00000000fffffff= f] [ 0.000000][ T0] Normal [mem 0x0000000100000000-0x00000093fcfffff= f] Maybe your memory starts between 0xe0000000-0xffffffff. That would be problematic (although somewhat unwarranted). Regards, Nicolas --=-HpXuUqy8wDt6AUMeP1G+ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEErOkkGDHCg2EbPcGjlfZmHno8x/4FAl2t8Q0ACgkQlfZmHno8 x/6stwf9HqWsWOip+MXq4sVWh+Y20OExIRxrBFOULlN6U/sctaP4D865ew+u+Q+w +W9JEpEC77RF5P5lrvYt+TgLFjggGREe7qZhjsfVNQBXUvrwsO5m842eoP852h6e japrXbQa51kSW5bdKgwSpi8+ZWw39O0IGNO/+kbts8eesc3IVbWYXOZ7lz0MIn44 OxocoMYDmWtCSR459p3O980E8KUzkyJD/4R9cGGfkO66RCPXaDy2pb2e2YD0mYL3 ArxUeTX2rLCjQcC7qGKFnCs/i50c5oRfdX25MZmn8t+c8ZNy0s8RuSvVR0uYj/HB 4t43gk/N8RDsPoNRxMFiDbJ3c0mbXA== =LNBk -----END PGP SIGNATURE----- --=-HpXuUqy8wDt6AUMeP1G+--