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 smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C2E5C433EF for ; Tue, 14 Jun 2022 02:55:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 0F8308145E; Tue, 14 Jun 2022 02:55:39 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s2oo_OnwleRR; Tue, 14 Jun 2022 02:55:38 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id DDD3E81446; Tue, 14 Jun 2022 02:55:37 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 9E625C0032; Tue, 14 Jun 2022 02:55:37 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id E54A9C002D for ; Tue, 14 Jun 2022 02:55:36 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id B7C9240992 for ; Tue, 14 Jun 2022 02:55:36 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=intel.com Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0_DkEnb9GQYu for ; Tue, 14 Jun 2022 02:55:35 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by smtp4.osuosl.org (Postfix) with ESMTPS id 8592340985 for ; Tue, 14 Jun 2022 02:55:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1655175335; x=1686711335; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Xv7uOd/xCgYNJDUjhoE9+434r7HieimT10GGGhVoaEI=; b=KmigKTkHqYWz018J+KI3JAATIX47ttMcph2Gf/xCV/kz4/t+rvRUKdcN 4Hkoh16EAk126Ou+79dpggNF3Cw0erWquLUaQVqFSJ25iewl5rRXBlpcL oJKPcImFXNwHvtMDHXx/DyI6rY16RQ2jtO+wHEI2XdtSK0TpNTxxzML9S 5QjG816oNuy9TPNNSG0zh6jCrq9TTGcr6etqF6YvFD2Xt/jW39lnHX/Um ZZu1kufGBl1yzXUX4CuSG9zgUpZXhS124Wm550T0ZW4klgAx0qsKMaWUj UaeJLb8x/0kV1ssQWZo91gqFGt1L0Es+28dePvbmRKnpejrMha0LIDBic w==; X-IronPort-AV: E=McAfee;i="6400,9594,10377"; a="303887013" X-IronPort-AV: E=Sophos;i="5.91,298,1647327600"; d="scan'208";a="303887013" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2022 19:55:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,298,1647327600"; d="scan'208";a="588166389" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga007.fm.intel.com with ESMTP; 13 Jun 2022 19:55:32 -0700 From: Lu Baolu To: Joerg Roedel , Kevin Tian , Ashok Raj , Christoph Hellwig , Jason Gunthorpe Subject: [PATCH v2 00/12] iommu/vt-d: Optimize the use of locks Date: Tue, 14 Jun 2022 10:51:25 +0800 Message-Id: <20220614025137.1632762-1-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Cc: Will Deacon , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jacob jun Pan , Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi folks, This series tries to optimize the uses of two locks in the Intel IOMMU driver: - The intel_iommu::lock is used to protect the IOMMU resources shared by devices. They include the IOMMU root and context tables, the pasid tables and the domain IDs. - The global device_domain_lock is used to protect the global and the per-domain device tracking lists. The optimization includes: - Remove the unnecessary global device tracking list; - Remove unnecessary locking; - Reduce the scope of the lock as much as possible, that is, use the lock only where necessary; - The global lock is transformed into a local lock to improve the efficiency. This series is also available on github: https://github.com/LuBaolu/intel-iommu/commits/intel-iommu-lock-optimization-v2 Your comments and suggestions are very appreciated. Best regards, baolu Change log: v2: - Split the lock-free page walk issue into a new patch: https://lore.kernel.org/linux-iommu/20220609070811.902868-1-baolu.lu@linux.intel.com/ - Drop the conversion from spinlock to mutex and make this series cleanup purpose only. - Address several comments received during v1 review. v1: - https://lore.kernel.org/linux-iommu/20220527063019.3112905-1-baolu.lu@linux.intel.com/ - Initial post. Lu Baolu (12): iommu/vt-d: debugfs: Remove device_domain_lock usage iommu/vt-d: Remove for_each_device_domain() iommu/vt-d: Remove clearing translation data in disable_dmar_iommu() iommu/vt-d: Use pci_get_domain_bus_and_slot() in pgtable_walk() iommu/vt-d: Unnecessary spinlock for root table alloc and free iommu/vt-d: Acquiring lock in domain ID allocation helpers iommu/vt-d: Acquiring lock in pasid manipulation helpers iommu/vt-d: Replace spin_lock_irqsave() with spin_lock() iommu/vt-d: Check device list of domain in domain free path iommu/vt-d: Fold __dmar_remove_one_dev_info() into its caller iommu/vt-d: Use device_domain_lock accurately iommu/vt-d: Convert global spinlock into per domain ones drivers/iommu/intel/iommu.h | 5 +- drivers/iommu/intel/pasid.h | 1 + drivers/iommu/intel/debugfs.c | 55 ++++--- drivers/iommu/intel/iommu.c | 279 ++++++++++------------------------ drivers/iommu/intel/pasid.c | 149 +++++++++--------- drivers/iommu/intel/svm.c | 5 +- 6 files changed, 185 insertions(+), 309 deletions(-) -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu