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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A9DF7C43332 for ; Wed, 18 Mar 2020 23:37:00 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 73FE420768 for ; Wed, 18 Mar 2020 23:37:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 73FE420768 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0EEDA6B00BC; Wed, 18 Mar 2020 19:37:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C77A6B00BD; 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18 Mar 2020 16:36:57 -0700 IronPort-SDR: iWLL0so8vWAv8LJ3GsCuRjlYx5tk6WyY6FjDNM9HWhQejXG7Wz9SFkrksY/mObp65UquXQBFLi iMcp6fB4PsSw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,569,1574150400"; d="scan'208";a="248349506" Received: from mannamax-mobl1.amr.corp.intel.com (HELO [10.252.140.209]) ([10.252.140.209]) by orsmga006.jf.intel.com with ESMTP; 18 Mar 2020 16:36:56 -0700 Subject: Re: [PATCH 1/4] hugetlbfs: add arch_hugetlb_valid_size To: Mike Kravetz , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-doc@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , "David S.Miller" , Thomas Gleixner , Ingo Molnar , Dave Hansen , Jonathan Corbet , Longpeng , Andrew Morton References: <20200318220634.32100-1-mike.kravetz@oracle.com> <20200318220634.32100-2-mike.kravetz@oracle.com> <831a0773-1ba6-4d72-44b9-7472123b8528@intel.com> <5aceea6a-8dc0-a44b-80c6-94511b5c75ca@oracle.com> From: Dave Hansen Openpgp: preference=signencrypt Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <5aceea6a-8dc0-a44b-80c6-94511b5c75ca@oracle.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 3/18/20 3:52 PM, Mike Kravetz wrote: > Sounds good. I'll incorporate those changes into a v2, unless someone > else with has a different opinion. >=20 > BTW, this patch should not really change the way the code works today. > It is mostly a movement of code. Unless I am missing something, the > existing code will always allow setup of PMD_SIZE hugetlb pages. Hah, I totally skipped over the old code in the diff. It looks like we'll disable hugetblfs *entirely* if PSE isn't supported. I think this is actually wrong, but nobody ever noticed. I think you'd have to be running as a guest under a hypervisor that's lying about PSE not being supported *and* care about 1GB pages. Nobody does that.