From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 79BD98F49; Wed, 20 Aug 2025 19:47:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755719246; cv=none; b=TdoxNF1WDKlKolakAbtH/TKYJDfuSIdYveiiIirRd6xlLyEYgnFb6pmxv1jc1YFdhlY6CHD0e1I+uEERwsEUK2W/V3VaI/epkCiOWmq2DPKvUxFGmAGf616nheVrcUdrOwr6CcLwWH4/Y9GHt+hAWZHyoA57RN7R125KN8nx84A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755719246; c=relaxed/simple; bh=0QRnWeSO3F/xWWbuXBtV4uFZx51lyDTg5SXS3HLdvBU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=N9AoW+aCT1qt/LOLGg66kQGdu30z4sP5DxpGg7zDI/JbDTNuJejGgyDQHLJK7bZvP5WlBi0cMMcvuSh+pJJwQF+KGDp2WAcuW5xChLDTO3DPlF5jZRF6uxpNeO/jDTyqLA6zJc9w1adJs3Xt2SUbid1exurZloma9h2SoEdgdj4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A786C4CEE7; Wed, 20 Aug 2025 19:47:24 +0000 (UTC) From: Dave Jiang To: linux-cxl@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, rafael@kernel.org, dakr@kernel.org, dave@stgolabs.net, jonathan.cameron@huawei.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, dan.j.williams@intel.com, marc.herbert@linux.intel.com, akpm@linux-foundation.org, david@redhat.com Subject: [PATCH v2 0/4] cxl, acpi/hmat, node: Update CXL access coordinates to node directly Date: Wed, 20 Aug 2025 12:47:00 -0700 Message-ID: <20250820194704.4130565-1-dave.jiang@intel.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit I plan to take this series through the CXL tree when all the necessary tags are received. Rafael, please ack patches 3/4 and 4/4 if you are happy with the changes. Thank you! v2: - Use clearer comment from DavidH for 1/4. (DavidH) - Fix comment in 2/4. (DavidH) - Streamline code in 2/4. (DavidH) - Add description to observed issue. (Dan) - Add correct Fixes tag. (Dan) - Add cc to stable for fix patch. (Dan) - Add mechansim to only update on first region for the node. (Jonathan) The series aim to clean up the current CXL memory region hotplug notifier by removing the update path through HMAT and updating the node access coordinates directly. With the existing implementation, the CXL memory hotplug notifier gets called first. It updates the HMAT target access coordinates. And then the HMAT notifier gets called and create the node sysfs attribs. The new implemenation flips the callback ordering and directly updates the sysfs attribs already created in the node and leaves HMAT data structures alone. Dave Jiang (4): mm/memory_hotplug: Update comment for hotplug memory callback priorities drivers/base/node: Add a helper function node_update_perf_attrs() cxl, acpi/hmat: Update CXL access coordinates directly instead of through HMAT acpi/hmat: Remove now unused hmat_update_target_coordinates() drivers/acpi/numa/hmat.c | 34 ---------------------------------- drivers/base/node.c | 38 ++++++++++++++++++++++++++++++++++++++ drivers/cxl/core/cdat.c | 11 ----------- drivers/cxl/core/core.h | 3 --- drivers/cxl/core/region.c | 21 +++++++++++++-------- include/linux/acpi.h | 12 ------------ include/linux/memory.h | 6 +++--- include/linux/node.h | 8 ++++++++ 8 files changed, 62 insertions(+), 71 deletions(-) base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 -- 2.50.1