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[2620:137:e000::1:20]) by mx.google.com with ESMTP id h17-20020a170902f7d100b001b8b4330585si3365764plw.510.2023.08.11.07.00.33; Fri, 11 Aug 2023 07:00:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229994AbjHKNLR (ORCPT + 99 others); Fri, 11 Aug 2023 09:11:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229927AbjHKNLL (ORCPT ); Fri, 11 Aug 2023 09:11:11 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43543119 for ; Fri, 11 Aug 2023 06:11:09 -0700 (PDT) Received: from kwepemi500019.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4RMkfS02syzrSbH; Fri, 11 Aug 2023 21:09:51 +0800 (CST) Received: from huawei.com (10.175.112.208) by kwepemi500019.china.huawei.com (7.221.188.117) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Fri, 11 Aug 2023 21:11:05 +0800 From: Zhang Zekun To: , , CC: , , , , , , Subject: [RESEND PATCH 0/2] iommu/iova: optimize the iova rcache Date: Fri, 11 Aug 2023 21:02:44 +0800 Message-ID: <20230811130246.42719-1-zhangzekun11@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.175.112.208] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemi500019.china.huawei.com (7.221.188.117) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773941501405089851 X-GMAIL-MSGID: 1773941501405089851 The number of iova_cpu_rcache can grow with the number of cpus in iova_rcache, but the size of rcache->depot will not. The deeper of rcache->depot can help iova_rcache cache more iovas, and can help iova_rcache better dealing with senarios in which drivers allocating and free iovas on different cpu cores. We only let the size of rcache->depot to grow with the number of cpus which is larger than 32 to avoid potential performance decrease on machines which don't have much cpus. Also, it is unsafe to directly free cpu rcache magazines in free_iova_rcaches, add check before freeing it. Zhang Zekun (2): iommu/iova: Add check for cpu_rcache in free_iova_rcaches iommu/iova: allocate iova_rcache->depot dynamicly drivers/iommu/iova.c | 36 +++++++++++++++++++++++++++++++----- 1 file changed, 31 insertions(+), 5 deletions(-)