From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89A2F156C6E; Mon, 6 May 2024 20:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715027305; cv=none; b=qaUWk1+KPcg8pH4I9pKnwyNje55OCw4iOBuOrdfyVKTg95RvKZInY+2jIp0F41C8frXINDMcG1BZ5lXBF2E6NEzBOgwEvCDa/PngbHSVE/oy3OGX1Rc/NzCkJWkGs/4L/UZqHK71iwa3JB3mU5OP8DooS7x910qYRV2B9G+Advw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715027305; c=relaxed/simple; bh=D0OobsD6K8gAqBNQ7TX2RYZyzVxpLG88EsKBKz07ibw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Eem4jFlrEy9l44Q03+sro9AWdDNrw+i5CldlZaCXBzsMiMDI2Gp0NX4XaCdOhR2b/yYh9oGt8/MDKKWLbH2mrlyvBFg5xCst2YIzmzCWluAD2duNl9ZyHzdI42WGV6QLmkknne3ax+8+m2gK2FHLcdW8sryJkCGcmKP+tX16l7I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=aNQ1VEJM; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="aNQ1VEJM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715027304; x=1746563304; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=D0OobsD6K8gAqBNQ7TX2RYZyzVxpLG88EsKBKz07ibw=; b=aNQ1VEJMIjiy6rv/9kzh9o5JM6mTejv3v6dCM6I3QE4DM4E3M88puBti MzcvSmjz5ayspX/y/fJZAG/8W6iYpi8MSP9Iep71Ad1DOY7ANmskYG8bH +anc8md0yXNT5dLUSdT5m4I94onqcJoGWFWkvOFnODnK9MkaHBcNSbjWD w4sa7aUwDFl//0+pLUMCutz4yvBTsGDrEzwgHyVZxEbU8ypuCgTKw19AR 92/N7+tDqdReLtbv5iFVW/zs8d/w7A288c367pS/lMfRSm02YampYz7NE UfjlRtIb/K8s+sFxQkU4cez54gYPWAYtSXAPffkiVPspj5uZvRjlZ+lHz Q==; X-CSE-ConnectionGUID: 2ykffqLLQGm1XIld6+/WAQ== X-CSE-MsgGUID: B91AZvLiRj289dvS+41r8A== X-IronPort-AV: E=McAfee;i="6600,9927,11065"; a="33297033" X-IronPort-AV: E=Sophos;i="6.07,259,1708416000"; d="scan'208";a="33297033" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2024 13:28:24 -0700 X-CSE-ConnectionGUID: DjyiNd3sSXCtcE/QcWH6wQ== X-CSE-MsgGUID: qLl6V1eMSCOnYYGhS3ERIQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,259,1708416000"; d="scan'208";a="28242490" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [10.124.222.135]) ([10.124.222.135]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2024 13:28:22 -0700 Message-ID: <3d18ae36-4dea-496a-a8fc-253b21135838@intel.com> Date: Mon, 6 May 2024 13:28:21 -0700 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [LSF/MM/BPF TOPIC] CXL Development Discussions To: Adam Manzanares , "lsf-pc@lists.linux-foundation.org" , "dan.j.williams@intel.com" , "jonathan.cameron@huawei.com" , "dave@stgolabs.net" , Fan Ni , "ira.weiny@intel.com" , "alison.schofield@intel.com" , "vishal.l.verma@intel.com" , "gourry.memverge@gmail.com" , "wj28.lee@gmail.com" , "rientjes@google.com" , "ruansy.fnst@fujitsu.com" , "shradha.t@samsung.com" , "mcgrof@kernel.org" , Jim Harris , "mhocko@suse.com" Cc: "linux-mm@kvack.org" , "linux-cxl@vger.kernel.org" , "linux-pci@vger.kernel.org" References: <9bf86b97-319f-4f58-b658-1fe3ed0b1993@nmtadam.samsung> Content-Language: en-US From: Dave Jiang In-Reply-To: <9bf86b97-319f-4f58-b658-1fe3ed0b1993@nmtadam.samsung> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/6/24 12:27 PM, Adam Manzanares wrote: > Hello all, > > I would like to have a discussion with the CXL development community about > current outstanding issues and also invite developers interested in RAS and > memory tiering to participate. > > The first topic I believe we should discuss is how we can ensure as a group > that we are prioritizing upstream work. On a recent upstream CXL development > discussion call there was a call to review more work. I apologize for not > grabbing the link, but I believe Dave Jiang is leveraging patchwork and this > link should be shared with others so we can help get more reviews where needed. Bundle for the potential fixes https://patchwork.kernel.org/bundle/cxllinux/cxl-fixes/ Bundle for the next merge window https://patchwork.kernel.org/bundle/cxllinux/cxl-next/ Just be aware patchwork only takes patches, so the bundle are registered with the first patch of a series. The listing does display the origin series. DJ > > The second topic I would like to discuss is how we integrate RAS features that > have similar equivalents in the kernel. A CXL device can provide info about > memory media errors in a similar fashion to memory controllers that have EDAC > support. Discussions have been put on the list and I would like to hear thoughts > from the community about where this should go [1]. On the same topic CXL has > port level RAS features and the PCIe DW series touched on this issue [2] > > The third topic I would like to discuss is how we can get a set of common > benchmarks for memory tiering evaluations. Our team has done some initial > work in this space, but we want to hear more from end users about their > workloads of concern. There was a proposal related to this topic, but from what > I understand no meeting has been held [3]. > > The last topic that I believe is worth discussion is how do we come up with > a baseline for testing. I am aware of 3 efforts that could be used cxl_test, > qemu, and uunit testing framework [4]. > > Apologies for getting this out late, and please include anyone that may be > interested in joining a discussion. > > [1] https://lore.kernel.org/linux-cxl/20240417075053.3273543-1-ruansy.fnst@fujitsu.com/ > [2] https://lore.kernel.org/lkml/20231130115044.53512-1-shradha.t@samsung.com/ > [3] https://lore.kernel.org/all/2b29dd3d-bb2c-6a8c-94d2-d5c2e035516a@google.com > [4] https://lore.kernel.org/linux-cxl/170795677066.3697776.12587812713093908173.stgit@ubuntu/