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Mon, 10 Jun 2019 16:07:18 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3020.oracle.com with ESMTP id 2t1jpgxxat-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 10 Jun 2019 16:07:18 +0000 Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x5AG7FxX009151; Mon, 10 Jun 2019 16:07:16 GMT Received: from char.us.oracle.com (/10.152.32.25) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 10 Jun 2019 09:07:15 -0700 Received: by char.us.oracle.com (Postfix, from userid 1000) id D3A6C6A00FC; Mon, 10 Jun 2019 12:08:38 -0400 (EDT) Date: Mon, 10 Jun 2019 12:08:38 -0400 From: Konrad Rzeszutek Wilk To: Lu Baolu Cc: David Woodhouse , Joerg Roedel , Bjorn Helgaas , Christoph Hellwig , ashok.raj@intel.com, jacob.jun.pan@intel.com, alan.cox@intel.com, kevin.tian@intel.com, mika.westerberg@linux.intel.com, Ingo Molnar , Greg Kroah-Hartman , pengfei.xu@intel.com, Marek Szyprowski , Robin Murphy , Jonathan Corbet , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Steven Rostedt , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Jacob Pan Subject: Re: [PATCH v4 7/9] iommu/vt-d: Add trace events for domain map/unmap Message-ID: <20190610160838.GY28796@char.us.oracle.com> References: <20190603011620.31999-1-baolu.lu@linux.intel.com> <20190603011620.31999-8-baolu.lu@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190603011620.31999-8-baolu.lu@linux.intel.com> User-Agent: Mutt/1.9.1 (2017-09-22) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9284 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=892 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906100109 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9284 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=940 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906100109 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 03, 2019 at 09:16:18AM +0800, Lu Baolu wrote: > This adds trace support for the Intel IOMMU driver. It > also declares some events which could be used to trace > the events when an IOVA is being mapped or unmapped in > a domain. Is that even needed considering SWIOTLB also has tracing events?