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[23.128.96.18]) by mx.google.com with ESMTP id a16si9538162eje.331.2021.02.08.15.32.08; Mon, 08 Feb 2021 15:32:47 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230213AbhBHXap (ORCPT + 99 others); Mon, 8 Feb 2021 18:30:45 -0500 Received: from mga09.intel.com ([134.134.136.24]:3720 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230071AbhBHXan (ORCPT ); Mon, 8 Feb 2021 18:30:43 -0500 IronPort-SDR: nvCwSVIzT0wuncrxFdc+MMsDEraiwpr+fh+Zpl2dgrDp7F4T9KUbArzLSsMhxB6g/vPH7GaLP4 u0jO/TGnoRgA== X-IronPort-AV: E=McAfee;i="6000,8403,9889"; a="181943588" X-IronPort-AV: E=Sophos;i="5.81,163,1610438400"; d="scan'208";a="181943588" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2021 15:30:01 -0800 IronPort-SDR: clCj60RdzLcq+1wGchwR0L2gVy+72jmFNyDm4l3plYEoEm4U46vZmmvtaD9CJWfe/0zyX54JCT z0Egamg+ua8Q== X-IronPort-AV: E=Sophos;i="5.81,163,1610438400"; d="scan'208";a="435840280" Received: from mbrandt-mobl.amr.corp.intel.com (HELO [10.212.254.119]) ([10.212.254.119]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2021 15:30:01 -0800 Subject: Re: [PATCH V6] x86/mm: Tracking linear mapping split events To: Saravanan D , x86@kernel.org, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, willy@infradead.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, linux-mm@kvack.org, songliubraving@fb.com, tj@kernel.org, hannes@cmpxchg.org References: <20210128212048.oopcyfdf4j2lc663@devvm1945.atn0.facebook.com> <20210128233430.1460964-1-saravanand@fb.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210128233430.1460964-1-saravanand@fb.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/28/21 3:34 PM, Saravanan D wrote: > > One of the many lasting sources of direct hugepage splits is kernel > tracing (kprobes, tracepoints). > > Note that the kernel's code segment [512 MB] points to the same > physical addresses that have been already mapped in the kernel's > direct mapping range. Looks fine to me: Acked-by: Dave Hansen