From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout1.samsung.com (mailout1.samsung.com [203.254.224.24]) (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 03B6D244660 for ; Mon, 6 Oct 2025 04:55:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.24 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759726507; cv=none; b=aEuWIed/tHBDfdO2Fc2Lv3UdYQbjlohUwq+Uv6bMEMhkVYnZUKr5wEVhGdYmOESTCJZ7n7rugbeCNlWJeqhb+rxxhjlE6p6j7Upp1ghVyF1dqk7/+V2hL5TeGo7yVV3OktZnlhJs52v+WbOzPWAadlhD9WG+17+WD+fPSz8z708= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759726507; c=relaxed/simple; bh=GKC2jDqhCQ9O8+7T7/rP9f5i7qZZ8jtAYhu+br1ex1Q=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:In-Reply-To: Content-Type:References; b=gYWJLh3Jcz1fJE3KuyeGtkJLNjoZSqH0p7P89O0vZlVf4+Y1SnJmMKAhuGGDtwJejm0apEStS2IhVvjWHmM/FUzHAMYQ2v+n/6yVbm4qhEHL6Oz2FjyeG7NtEeY9zXu6CaTuzSZ3XZYrSi7Gfrg++pqjpLnaas6t6gllvNpyIKM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=RdoRTj9r; arc=none smtp.client-ip=203.254.224.24 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="RdoRTj9r" Received: from epcas5p2.samsung.com (unknown [182.195.41.40]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20251006045503epoutp01cfd8ce6d27c5182acd4adfbf9d5b6095~rze5td5y51805018050epoutp01U for ; Mon, 6 Oct 2025 04:55:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20251006045503epoutp01cfd8ce6d27c5182acd4adfbf9d5b6095~rze5td5y51805018050epoutp01U DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1759726503; bh=GKC2jDqhCQ9O8+7T7/rP9f5i7qZZ8jtAYhu+br1ex1Q=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=RdoRTj9rGdcSaUPO5g01FYSQkoflGmG+4gPURTZczSTVM6x/s8C5mJhqA37nNXacQ U6GzAGUj1+OJxNicRZ4KO5Ix7SEc9ZmfY51siPqaJmOedQFONreoLOov21qHBlLt2+ b8AdaWHAm1/aZna99K79VGpu3/7qbsW8iQr8skUM= Received: from epsnrtp03.localdomain (unknown [182.195.42.155]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPS id 20251006045502epcas5p3585481acefe7e77e2d8e80ee0dddb36e~rze5X_Hw90897408974epcas5p3V; Mon, 6 Oct 2025 04:55:02 +0000 (GMT) Received: from epcpadp1new (unknown [182.195.40.141]) by epsnrtp03.localdomain (Postfix) with ESMTP id 4cg6QG6l4Nz3hhT7; Mon, 6 Oct 2025 04:55:02 +0000 (GMT) Received: from epsmtip2.samsung.com (unknown [182.195.34.31]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPA id 20250929133323epcas5p11c22399e6fa7cd5806f84e2106b09951~pxCd13SUR2718427184epcas5p18; Mon, 29 Sep 2025 13:33:23 +0000 (GMT) Received: from test-PowerEdge-R740xd (unknown [107.99.41.79]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250929133321epsmtip2dab0f6778d09657ff92da18130db8819~pxCcrNI1A2858028580epsmtip2W; Mon, 29 Sep 2025 13:33:21 +0000 (GMT) Date: Mon, 29 Sep 2025 19:03:17 +0530 From: Neeraj Kumar To: Alison Schofield Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, gost.dev@samsung.com, a.manzanares@samsung.com, vishak.g@samsung.com, neeraj.kernel@gmail.com, cpgs@samsung.com Subject: Re: [PATCH V3 00/20] Add CXL LSA 2.1 format support in nvdimm and cxl pmem Message-ID: <1931444790.41759726502934.JavaMail.epsvc@epcpadp1new> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: X-CMS-MailID: 20250929133323epcas5p11c22399e6fa7cd5806f84e2106b09951 X-Msg-Generator: CA Content-Type: multipart/mixed; boundary="----DpLuDkH5jVwtRmV_no6S5rPRFid5ecuUEflgz2nUXUkLddKC=_7375_" CMS-TYPE: 105P X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20250917134126epcas5p3e20c773759b91f70a1caa32b9f6f27ff References: <20250917134116.1623730-1-s.neeraj@samsung.com> ------DpLuDkH5jVwtRmV_no6S5rPRFid5ecuUEflgz2nUXUkLddKC=_7375_ Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Disposition: inline On 23/09/25 04:04PM, Alison Schofield wrote: >On Wed, Sep 17, 2025 at 07:10:56PM +0530, Neeraj Kumar wrote: >> Introduction: >> ============= >> CXL Persistent Memory (Pmem) devices region, namespace and content must be >> persistent across system reboot. In order to achieve this persistency, it >> uses Label Storage Area (LSA) to store respective metadata. During system >> reboot, stored metadata in LSA is used to bring back the region, namespace >> and content of CXL device in its previous state. >> CXL specification provides Get_LSA (4102h) and Set_LSA (4103h) mailbox >> commands to access the LSA area. nvdimm driver is using same commands to >> get/set LSA data. > >big snip... > >> Limitation (TODO): >> ================== >> Current changes only support interleave way == 1 > >I see your test setup with the one way interleave and read this >limitation. What are your plans regarding this? > >ie. Do you see this limitation as something you could merge with >or do you plan to extend this patchset with support for namespaces >build upon region ways > 1. > >-- Alison Hi Alison, My current focus is to get current patch-set upstreamed as its in good shape wrt interleave way == 1. Multi-interleave support will require some more efforts on top of this change. So will take it in another series. Regards, Neeraj ------DpLuDkH5jVwtRmV_no6S5rPRFid5ecuUEflgz2nUXUkLddKC=_7375_ Content-Type: text/plain; charset="utf-8" ------DpLuDkH5jVwtRmV_no6S5rPRFid5ecuUEflgz2nUXUkLddKC=_7375_--