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Violators will be prosecuted for from ; Tue, 8 May 2018 10:46:54 +0100 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp12.uk.ibm.com (192.168.101.142) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 8 May 2018 10:46:47 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w489klPv6881762; Tue, 8 May 2018 09:46:47 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 76EF142047; Tue, 8 May 2018 10:37:50 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 439A742045; Tue, 8 May 2018 10:37:50 +0100 (BST) Received: from localhost (unknown [9.124.35.77]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 8 May 2018 10:37:50 +0100 (BST) Date: Tue, 08 May 2018 15:16:43 +0530 From: "Naveen N. Rao" Subject: Re: [PATCH v3 6/9] trace_uprobe: Support SDT markers having reference count (semaphore) To: Masami Hiramatsu , Ravi Bangoria Cc: acme@kernel.org, akpm@linux-foundation.org, alexander.shishkin@linux.intel.com, alexis.berlemont@gmail.com, ananth@linux.vnet.ibm.com, corbet@lwn.net, dan.j.williams@intel.com, fengguang.wu@intel.com, jglisse@redhat.com, jolsa@redhat.com, kan.liang@intel.com, kjlx@templeofstupid.com, kstewart@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, milian.wolff@kdab.com, mingo@redhat.com, namhyung@kernel.org, oleg@redhat.com, pc@us.ibm.com, peterz@infradead.org, rostedt@goodmis.org, srikar@linux.vnet.ibm.com, tglx@linutronix.de, yao.jin@linux.intel.com References: <20180417043244.7501-1-ravi.bangoria@linux.vnet.ibm.com> <20180417043244.7501-7-ravi.bangoria@linux.vnet.ibm.com> <20180504134816.8633a157dd036489d9b0f1db@kernel.org> <206e4a16-ae21-7da3-f752-853dc2f51947@linux.ibm.com> <20180508005651.45553d3cf72521481d16b801@kernel.org> In-Reply-To: <20180508005651.45553d3cf72521481d16b801@kernel.org> User-Agent: astroid/0.11.1 (https://github.com/astroidmail/astroid) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8BIT X-TM-AS-GCONF: 00 x-cbid: 18050809-0008-0000-0000-000004F449E8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050809-0009-0000-0000-00001E888A7A Message-Id: <1525772725.o3tzigt8c3.naveen@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-08_04:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805080095 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Masami Hiramatsu wrote: > On Mon, 7 May 2018 13:51:21 +0530 > Ravi Bangoria wrote: > >> BTW, same issue exists for normal uprobe. If uprobe_mmap() fails, >> there is no feedback to trace_uprobe and no warnigns in dmesg as >> well !! There was a patch by Naveen to warn such failures in dmesg >> but that didn't go in: https://lkml.org/lkml/2017/9/22/155 > > Oops, that's a real bug. It seems the ball is in Naveen's hand. > Naveen, could you update it according to Oleg's comment, and resend it? Yes, I've had to put that series on the backburner. I will try and get to it soon. Thanks for the reminder. - Naveen