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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8BA6DC433ED for ; Thu, 13 May 2021 13:56:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 707BB613D3 for ; Thu, 13 May 2021 13:56:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234230AbhEMN51 (ORCPT ); Thu, 13 May 2021 09:57:27 -0400 Received: from mga06.intel.com ([134.134.136.31]:50753 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234247AbhEMN5K (ORCPT ); Thu, 13 May 2021 09:57:10 -0400 IronPort-SDR: eCyfkbWqkK/J+JTmoUOg29SvaEtZO/NgZEvzZpB8BxfSPDZv3Mrhzen4Vq/K+43+nygKXnSole Z7v6+1JWJ16g== X-IronPort-AV: E=McAfee;i="6200,9189,9982"; a="261192489" X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="261192489" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2021 06:55:40 -0700 IronPort-SDR: E7MsCeLURvjkO8scuNIcUFItxDAsnvhqWBHYpktm7lmYLXo6ysWw8GHdgIjK/e3A1ZeSRxH17p 1xxoRRCsMNSQ== X-IronPort-AV: E=Sophos;i="5.82,296,1613462400"; d="scan'208";a="400995872" Received: from bchunch-mobl.amr.corp.intel.com (HELO [10.209.17.244]) ([10.209.17.244]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2021 06:55:38 -0700 Subject: Re: [RFC PATCH 2/2] mempolicy: kill MPOL_F_LOCAL bit To: Feng Tang , Michal Hocko , "Hansen, Dave" , "Widawsky, Ben" Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , Andrea Arcangeli , David Rientjes , Mel Gorman , Mike Kravetz , Randy Dunlap , Vlastimil Babka , "Williams, Dan J" , ying.huang@intel.com References: <1615952410-36895-1-git-send-email-feng.tang@intel.com> <1615952410-36895-4-git-send-email-feng.tang@intel.com> <20210420071625.GB48282@shbuild999.sh.intel.com> <20210513072545.GC44993@shbuild999.sh.intel.com> From: Andi Kleen Message-ID: <8e1cf4dd-1bb2-fbcb-4960-65db8704ec38@linux.intel.com> Date: Thu, 13 May 2021 06:55:38 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <20210513072545.GC44993@shbuild999.sh.intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/13/2021 12:25 AM, Feng Tang wrote: > mempolicy: kill MPOL_F_LOCAL bit > > Now the only remaining case of actual 'local' policy faked by > 'prefer' policy plus MPOL_F_LOCAL bit is: > > A valid 'prefer' policy with a valid 'preferred' node is 'rebind' > to a nodemask which doesn't contains the 'preferred' node, then it > will handle allocation with 'local' policy. > > Add a new 'MPOL_F_LOCAL_TEMP' bit for this case, and kill the > MPOL_F_LOCAL bit, which could simplify the code much. Reviewed-by: Andi Kleen -Andi