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 2105FECAAD8 for ; Fri, 23 Sep 2022 08:07:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 885A680008; Fri, 23 Sep 2022 04:07:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 836AC80007; Fri, 23 Sep 2022 04:07:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6D69280008; Fri, 23 Sep 2022 04:07:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 5BB4180007 for ; Fri, 23 Sep 2022 04:07:49 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 32055AB983 for ; Fri, 23 Sep 2022 08:07:49 +0000 (UTC) X-FDA: 79942621458.12.B974EDC Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by imf24.hostedemail.com (Postfix) with ESMTP id 7909B180004 for ; Fri, 23 Sep 2022 08:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663920468; x=1695456468; h=from:to:cc:subject:references:date:in-reply-to: message-id:mime-version:content-transfer-encoding; bh=uBsTZao/V9u69Rkv2ClXIbFBUPJIjmVzZTRL2kTNlC8=; b=KkHZ8FKTT+eSm4F93QwKkpGEdMMXj8UeTi+lqm2wwSNZddkgOz2hFp9r t4MtOnaXkGTlsdK6cWP23OpK1wCFlZsMjo5YlEmURNyU/6+7ofFItKDhs Lpx6fiqv9NTDoND96SDkPMow5pueK7gAWvjbUQhPA4Hm1PP6P+7D5PW9P WlyHPl4cFH10axyE76yCZjJV7paBd9BB5zCdqPSXuAjatZVtSnuKzsf0k QI5mHG8sqX+GYRqbeR35K3QzjBIDQV9IJA4Buj7YQWrjlTMGQIkqOupvD 6ZzxuLEAPYgLM25iGt3PohfedGVbnN1I3gi71DK9W5Z4o/tEJFxVAt0Ly Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10478"; a="362350570" X-IronPort-AV: E=Sophos;i="5.93,337,1654585200"; d="scan'208";a="362350570" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 01:07:46 -0700 X-IronPort-AV: E=Sophos;i="5.93,337,1654585200"; d="scan'208";a="762533962" Received: from yhuang6-desk2.sh.intel.com (HELO yhuang6-desk2.ccr.corp.intel.com) ([10.238.208.55]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2022 01:07:43 -0700 From: "Huang, Ying" To: "Aneesh Kumar K.V" Cc: linux-mm@kvack.org, akpm@linux-foundation.org, Wei Xu , Yang Shi , Davidlohr Bueso , Tim C Chen , Michal Hocko , Linux Kernel Mailing List , Hesham Almatary , Dave Hansen , Jonathan Cameron , Alistair Popple , Dan Williams , Johannes Weiner , jvgediya.oss@gmail.com, Bharata B Rao Subject: Re: [PATCH v4] mm/demotion: Expose memory tier details via sysfs References: <20220922102201.62168-1-aneesh.kumar@linux.ibm.com> Date: Fri, 23 Sep 2022 16:07:42 +0800 In-Reply-To: <20220922102201.62168-1-aneesh.kumar@linux.ibm.com> (Aneesh Kumar K. V.'s message of "Thu, 22 Sep 2022 15:52:01 +0530") Message-ID: <874jwyjyy9.fsf@yhuang6-desk2.ccr.corp.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1663920468; a=rsa-sha256; cv=none; b=oNnhzmiGVruwDNxiUlwVSya2ZrsEB1HUoHD90LesvtQG1zeBmR4KnZ2yjz/95RK7QpzqRI Av/Bq8ftSKEZfmRJm4Okd5owKZEip3F5UyPwTPvKxKTLU2hg/pz5MVgQrd8T+b6m79NOCM McXem7y2XWsvfs1daENqkeK/PPT8F7I= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=KkHZ8FKT; spf=pass (imf24.hostedemail.com: domain of ying.huang@intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=ying.huang@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1663920468; 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=uBsTZao/V9u69Rkv2ClXIbFBUPJIjmVzZTRL2kTNlC8=; b=NDMXKpBD2IT0LH5r8GG5ycZFEoQLlzAiCZDFvmTu7lj9y0z/j75eBAgmwX6arXE2wHfwyU Uz0LX6XHuJEhwNVCRK0BtAI0n7I5mZ0ur21/N0iDphdebr1xRQ4dWaAqyyuR8tP7tDKhFe FyRvMxLumaMzQ+QYkQy06LfL5t4Cp8Q= Authentication-Results: imf24.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=KkHZ8FKT; spf=pass (imf24.hostedemail.com: domain of ying.huang@intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=ying.huang@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Rspam-User: X-Stat-Signature: c5ok1h3mpwy95ewry8bzpee4zenfxdkj X-Rspamd-Queue-Id: 7909B180004 X-Rspamd-Server: rspam02 X-HE-Tag: 1663920468-283770 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: "Aneesh Kumar K.V" writes: > This patch adds /sys/devices/virtual/memory_tiering/ where all memory tier > related details can be found. All allocated memory tiers will be listed > there as /sys/devices/virtual/memory_tiering/memory_tierN/ > > The nodes which are part of a specific memory tier can be listed via > /sys/devices/virtual/memory_tiering/memory_tierN/nodes It appears that XXXs is used for mask while XXXs_list is used for list? For example, # cat /sys/devices/system/cpu/cpu2/topology/core_cpus 0,00100004 # cat /sys/devices/system/cpu/cpu2/topology/core_cpus_list 2,20 It's better to follow the this convention? > A directory hierarchy looks like > :/sys/devices/virtual/memory_tiering$ tree memory_tier4/ > memory_tier4/ > =E2=94=9C=E2=94=80=E2=94=80 nodes > =E2=94=9C=E2=94=80=E2=94=80 subsystem -> ../../../../bus/memory_tiering > =E2=94=94=E2=94=80=E2=94=80 uevent > > :/sys/devices/virtual/memory_tiering$ cat memory_tier4/nodes > 0,2 > > Signed-off-by: Aneesh Kumar K.V Best Regards, Huang, Ying [snip]