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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70657C433FE for ; Tue, 18 Oct 2022 21:02:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 177AB8E0001; Tue, 18 Oct 2022 17:02:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 127C26B007B; Tue, 18 Oct 2022 17:02:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F32B78E0001; Tue, 18 Oct 2022 17:02:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id E6F426B0078 for ; Tue, 18 Oct 2022 17:02:48 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id BEF791405E2 for ; Tue, 18 Oct 2022 21:02:48 +0000 (UTC) X-FDA: 80035294416.16.7BD150A Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by imf27.hostedemail.com (Postfix) with ESMTP id 0DE6440027 for ; Tue, 18 Oct 2022 21:02:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666126967; x=1697662967; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=HaNZmq41zK29iOnkJK28GdD5R+VHcXlZCvrP5NcvQyo=; b=anP3ervLquBs7g7A2YxM88aX3Hs/fcGzcg1hTcTcLW3mWhjUc7aIvcbA kkpFwAR08F62Znll9/5283xvjzPMRmSs1lUEHCc9w/QlJdgahWKq4+IOi tNN7y/r0ZBzNLvCvhy9k/UW+YdBqUCXOUo6XXyKVQ+wx0EYHTUHW0P1Od t7qaVwrpkL1GwrFsPkQac8j++WdmnBUw9mpSLcFJqqGV8hL4BuZwVjxX0 9F7pEDmSAjg+G4xNm2lsDaIrlDW46SjRrKgZPMDpMQ83pm5ZsldxDjM3Q q4lDqbXB/AHjnSD4iWJez2dfPp2PjYMbfb3Vx1a/mcEpcTRBCwQym7IS8 A==; X-IronPort-AV: E=McAfee;i="6500,9779,10504"; a="286625258" X-IronPort-AV: E=Sophos;i="5.95,194,1661842800"; d="scan'208";a="286625258" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2022 14:02:45 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10504"; a="631323993" X-IronPort-AV: E=Sophos;i="5.95,194,1661842800"; d="scan'208";a="631323993" Received: from jjsopko-mobl.amr.corp.intel.com (HELO [10.213.163.40]) ([10.213.163.40]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2022 14:02:44 -0700 Message-ID: Date: Tue, 18 Oct 2022 14:02:43 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2 Subject: Re: [PATCHv10 09/15] x86: Expose untagging mask in /proc/$PID/arch_status Content-Language: en-US To: "Kirill A. Shutemov" , Dave Hansen , Andy Lutomirski , Peter Zijlstra Cc: x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , Bharata B Rao , Jacob Pan , Ashok Raj , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20221018113358.7833-1-kirill.shutemov@linux.intel.com> <20221018113358.7833-10-kirill.shutemov@linux.intel.com> From: Dave Hansen In-Reply-To: <20221018113358.7833-10-kirill.shutemov@linux.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666126967; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=+4InNMuTBeW/d1W3nfxjFj4AYqy2yLyIxLppJvXjSHo=; b=hJfoySarlG9KNHsUB25Dk+IDxCYkkjPm2DeWba7SxEIOr5/7XFoMwSggld8pKRwPAuUOnc goZKnVlrhoNBX5ZZSA8RUBiQQ5JwR4tzBvzMKBOA+qHeMJeAKRGROZEn/A0pPWy3f/s4TU 5cFs+GDZ9/9XYiSUMaJrOnLdm+JyAhQ= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=anP3ervL; spf=pass (imf27.hostedemail.com: domain of dave.hansen@intel.com designates 192.55.52.151 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666126967; a=rsa-sha256; cv=none; b=q/R+pSv6CkWcuAAplmWIzsJReM/hEycI6wVFNWsxlh2l7eR4jkd/yaqD2n4O3gTB25pTw/ R2ZPjrsA5aUeic/M8qTtDI5NhBojvp2E0aweHwsiP+yav3iFfECsjKUrcx3PnzeVttpy+/ 4d4JV2OwCGh8/2H+gEo6g/hsoQaMV04= X-Rspamd-Server: rspam12 X-Rspam-User: Authentication-Results: imf27.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=anP3ervL; spf=pass (imf27.hostedemail.com: domain of dave.hansen@intel.com designates 192.55.52.151 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Stat-Signature: x5xgtyxwfnzuhjwki79ybq3mpxtg8ia4 X-Rspamd-Queue-Id: 0DE6440027 X-HE-Tag: 1666126966-749143 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 10/18/22 04:33, Kirill A. Shutemov wrote: > Add a line in /proc/$PID/arch_status to report untag_mask. It can be > used to find out LAM status of the process from the outside. It is > useful for debuggers. Considering that address masking is not x86-specific, it seems like this needs a better home (another file in /proc). This could even be left out of the series for now, right? Nothing, including the selftests, depends on it.