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 X-Spam-Level: X-Spam-Status: No, score=-6.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA511C2D0E4 for ; Tue, 17 Nov 2020 10:30:10 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6473622202 for ; Tue, 17 Nov 2020 10:30:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6473622202 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 0485587146; Tue, 17 Nov 2020 10:30:10 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vbfoo0wu0+2j; Tue, 17 Nov 2020 10:30:09 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 7118A87168; Tue, 17 Nov 2020 10:30:09 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 57C95C0891; Tue, 17 Nov 2020 10:30:09 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2F43BC07FF for ; Tue, 17 Nov 2020 10:30:07 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 1C1E48669E for ; Tue, 17 Nov 2020 10:30:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ndrV5GdxTS1K for ; Tue, 17 Nov 2020 10:30:03 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) by whitealder.osuosl.org (Postfix) with ESMTPS id 47EB68669F for ; Tue, 17 Nov 2020 10:30:03 +0000 (UTC) Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4Cb2Hm0JxfzLmCh; Tue, 17 Nov 2020 18:29:40 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Tue, 17 Nov 2020 18:29:51 +0800 From: John Garry To: , , Subject: [RESEND PATCH v3 0/4] iommu/iova: Solve longterm IOVA issue Date: Tue, 17 Nov 2020 18:25:30 +0800 Message-ID: <1605608734-84416-1-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Cc: linuxarm@huawei.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, xiyou.wangcong@gmail.com 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" This series contains a patch to solve the longterm IOVA issue which leizhen originally tried to address at [0]. A sieved kernel log is at the following, showing periodic dumps of IOVA sizes, per CPU and per depot bin, per IOVA size granule: https://raw.githubusercontent.com/hisilicon/kernel-dev/topic-iommu-5.10-iova-debug-v3/aging_test Notice, for example, the following logs: [13175.355584] print_iova1 cpu_total=40135 depot_total=3866 total=44001 [83483.457858] print_iova1 cpu_total=62532 depot_total=24476 total=87008 Where total IOVA rcache size has grown from 44K->87K over a long time. Along with this patch, I included the following: - A smaller helper to clear all IOVAs for a domain - Change polarity of the IOVA magazine helpers - Small optimisation from Cong Wang included, which was never applied [1]. There was some debate of the other patches in that series, but this one is quite straightforward. Differnces to v2: - Update commit message for patch 3/4 Differences to v1: - Add IOVA clearing helper - Add patch to change polarity of mag helpers - Avoid logically-redundant extra variable in __iova_rcache_insert() [0] https://lore.kernel.org/linux-iommu/20190815121104.29140-3-thunder.leizhen@huawei.com/ [1] https://lore.kernel.org/linux-iommu/4b74d40a-22d1-af53-fcb6-5d70183705a8@huawei.com/ Cong Wang (1): iommu: avoid taking iova_rbtree_lock twice John Garry (3): iommu/iova: Add free_all_cpu_cached_iovas() iommu/iova: Avoid double-negatives in magazine helpers iommu/iova: Flush CPU rcache for when a depot fills drivers/iommu/iova.c | 66 +++++++++++++++++++++++++------------------- 1 file changed, 38 insertions(+), 28 deletions(-) -- 2.26.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu