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=-1.8 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 F3127C433FF for ; Wed, 14 Aug 2019 15:17:40 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 BAA232084D for ; Wed, 14 Aug 2019 15:17:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="pcnVgWDP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BAA232084D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 62AF8CCC; Wed, 14 Aug 2019 15:17:40 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 5914DC59 for ; Wed, 14 Aug 2019 14:50:38 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id C881587E for ; Wed, 14 Aug 2019 14:50:37 +0000 (UTC) Received: by mail-wm1-f43.google.com with SMTP id i63so4721151wmg.4 for ; Wed, 14 Aug 2019 07:50:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=/DXlUZnAnppcVmvRaCvG45NAF6K209fxQvIeSZzOmy4=; b=pcnVgWDPpVIKvEGcoQm5OxaoBVqYZbMOQiqkZ3wTAZr8Y6ocDyeakMLA8Im1Y+g99D POTgttsWlFnHPGAOzmL9x63nQingz9nYI4tmdXIrqRiCxn+kPG3T16a2nvIYG8GQ2Vzs Wce7Jnayh7CiIlLHBB2wEP03uzF21zbs288aBwspAfbTH7jE/zAGLwIiABldEZ0t2MFl 7g+sqkueLUfkGGO7etvOXVSscsbkaSLTKp6TuYRkN4eneuKFf/g2q7u1xTmiXRL4QSi9 08axMg8aBPXjCpcOkD6x6gdVVXu3E7WHEH7t0kz1SSsDjvHpa4CY59KwF9g2UEt0zSR3 HS0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=/DXlUZnAnppcVmvRaCvG45NAF6K209fxQvIeSZzOmy4=; b=dAXjRG2KmqgIaCUG9cbRryvljGb94O5lst04G4Wm87VbVK6o27/psKfvmQzAPX9X2F mNFhPC69nMh4tY78k4p3ffcIhc+O+FAHo7/PAU/qCBS7QEbbpTwX6NTBWOoiZ8xqqtdF EBzhqpK1kMaMlSETilo0XfMQn7jy8WFDdmt1IRhdIdEVAqpr/cT9fY+RAEhhAhU9w3xY +FSxS6G0Ugj3EeLDGnldhqJgVpcAuS9VigS71YqArZe70a+LTZaToAnRYyDT9fVWHCId yDEynJ4ukTAb5aNmGJXw/ZzkVYm31/Fz+Kms2ia4NXg3nFvw4zdNqHoWopFIckncNsws 3lJg== X-Gm-Message-State: APjAAAWFXRAl3vGHW4chm3miz3YlmfPO4u3nY63Sq5VSigkr8OG2Ei9i a1awCQ5LauEMhbl9JRPIs9c= X-Google-Smtp-Source: APXvYqzoe9W3VA/sAzPxBxLK/CY1XdtfCqCC8uiIxtC44+YlxqrDtNJOaniUqy9vvtFN3+P4u+PPwA== X-Received: by 2002:a7b:cbcf:: with SMTP id n15mr9053044wmi.48.1565794236524; Wed, 14 Aug 2019 07:50:36 -0700 (PDT) Received: from Red ([2a01:cb1d:147:7200:2e56:dcff:fed2:c6d6]) by smtp.googlemail.com with ESMTPSA id t198sm7911434wmt.39.2019.08.14.07.50.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Aug 2019 07:50:35 -0700 (PDT) Date: Wed, 14 Aug 2019 16:50:33 +0200 From: Corentin Labbe To: bskeggs@redhat.com, airlied@linux.ie, daniel@ffwll.ch, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com Subject: DMA-API: cacheline tracking ENOMEM, dma-debug disabled due to nouveau ? Message-ID: <20190814145033.GA11190@Red> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Mailman-Approved-At: Wed, 14 Aug 2019 15:17:38 +0000 Cc: nouveau@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hello Since lot of release (at least since 4.19), I hit the following error message: DMA-API: cacheline tracking ENOMEM, dma-debug disabled After hitting that, I try to check who is creating so many DMA mapping and see: cat /sys/kernel/debug/dma-api/dump | cut -d' ' -f2 | sort | uniq -c 6 ahci 257 e1000e 6 ehci-pci 5891 nouveau 24 uhci_hcd Does nouveau having this high number of DMA mapping is normal ? Regards _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu