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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 AE489C3279B for ; Wed, 4 Jul 2018 05:27:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 730F82473F for ; Wed, 4 Jul 2018 05:27:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 730F82473F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933184AbeGDF1H (ORCPT ); Wed, 4 Jul 2018 01:27:07 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:52248 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753518AbeGDF1F (ORCPT ); Wed, 4 Jul 2018 01:27:05 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w645OQsq002703 for ; Wed, 4 Jul 2018 01:27:05 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2k0qsr8ksw-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 04 Jul 2018 01:27:05 -0400 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 4 Jul 2018 06:26:47 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w645QkC425952478 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 4 Jul 2018 05:26:46 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3468EAE051; Wed, 4 Jul 2018 08:26:48 +0100 (BST) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E763FAE058; Wed, 4 Jul 2018 08:26:44 +0100 (BST) Received: from [9.124.31.203] (unknown [9.124.31.203]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 4 Jul 2018 08:26:44 +0100 (BST) Subject: Re: [PATCH v5 06/10] Uprobes: Support SDT markers having reference count (semaphore) To: Oleg Nesterov Cc: Srikar Dronamraju , rostedt@goodmis.org, mhiramat@kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, linux-doc@vger.kernel.org, ananth@linux.vnet.ibm.com, alexis.berlemont@gmail.com, naveen.n.rao@linux.vnet.ibm.com, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linux@armlinux.org.uk, ralf@linux-mips.org, paul.burton@mips.com, Ravi Bangoria References: <20180628052209.13056-1-ravi.bangoria@linux.ibm.com> <20180628052209.13056-7-ravi.bangoria@linux.ibm.com> <20180702160158.GD65296@linux.vnet.ibm.com> <20180703192634.GA32223@redhat.com> From: Ravi Bangoria Date: Wed, 4 Jul 2018 10:56:42 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180703192634.GA32223@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 18070405-4275-0000-0000-00000294F0DF X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18070405-4276-0000-0000-0000379C726F Message-Id: <20d12c56-77f6-4d87-8498-d5bc090444e5@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-04_02:,, 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=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=822 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807040064 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/04/2018 12:56 AM, Oleg Nesterov wrote: > On 07/03, Ravi Bangoria wrote: >> >> Now about adding ref_ctr_offset into uprobe_consumer. Actually, I >> didn't want to change the uprobe_consumer definition because it's >> already exported and tools like systemtap are using it. > > So what? Yes, the out-of-tree modules should be updated, but this doesn't > mean we can add the new features. > > And, speaking of systemtap, it already has to do build-time checks to verify > that uprobe_consumer->ret_handler member exists. So it will need another > STAPCONF_INODE_REFCNT and that is all. Ok. let me explore that possibility as well. Thanks, Ravi From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 71CE87DF93 for ; Wed, 4 Jul 2018 05:27:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753529AbeGDF1F (ORCPT ); Wed, 4 Jul 2018 01:27:05 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:37454 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752975AbeGDF1F (ORCPT ); Wed, 4 Jul 2018 01:27:05 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w645PpaL117162 for ; Wed, 4 Jul 2018 01:27:04 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2k0r36810m-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 04 Jul 2018 01:27:04 -0400 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 4 Jul 2018 06:26:47 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w645QkC425952478 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 4 Jul 2018 05:26:46 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3468EAE051; Wed, 4 Jul 2018 08:26:48 +0100 (BST) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E763FAE058; Wed, 4 Jul 2018 08:26:44 +0100 (BST) Received: from [9.124.31.203] (unknown [9.124.31.203]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 4 Jul 2018 08:26:44 +0100 (BST) Subject: Re: [PATCH v5 06/10] Uprobes: Support SDT markers having reference count (semaphore) To: Oleg Nesterov Cc: Srikar Dronamraju , rostedt@goodmis.org, mhiramat@kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, linux-doc@vger.kernel.org, ananth@linux.vnet.ibm.com, alexis.berlemont@gmail.com, naveen.n.rao@linux.vnet.ibm.com, linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org, linux@armlinux.org.uk, ralf@linux-mips.org, paul.burton@mips.com, Ravi Bangoria References: <20180628052209.13056-1-ravi.bangoria@linux.ibm.com> <20180628052209.13056-7-ravi.bangoria@linux.ibm.com> <20180702160158.GD65296@linux.vnet.ibm.com> <20180703192634.GA32223@redhat.com> From: Ravi Bangoria Date: Wed, 4 Jul 2018 10:56:42 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180703192634.GA32223@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 18070405-4275-0000-0000-00000294F0DF X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18070405-4276-0000-0000-0000379C726F Message-Id: <20d12c56-77f6-4d87-8498-d5bc090444e5@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-04_02:,, 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=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=845 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807040064 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On 07/04/2018 12:56 AM, Oleg Nesterov wrote: > On 07/03, Ravi Bangoria wrote: >> >> Now about adding ref_ctr_offset into uprobe_consumer. Actually, I >> didn't want to change the uprobe_consumer definition because it's >> already exported and tools like systemtap are using it. > > So what? Yes, the out-of-tree modules should be updated, but this doesn't > mean we can add the new features. > > And, speaking of systemtap, it already has to do build-time checks to verify > that uprobe_consumer->ret_handler member exists. So it will need another > STAPCONF_INODE_REFCNT and that is all. Ok. let me explore that possibility as well. Thanks, Ravi -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: ravi.bangoria@linux.ibm.com (Ravi Bangoria) Date: Wed, 4 Jul 2018 10:56:42 +0530 Subject: [PATCH v5 06/10] Uprobes: Support SDT markers having reference count (semaphore) In-Reply-To: <20180703192634.GA32223@redhat.com> References: <20180628052209.13056-1-ravi.bangoria@linux.ibm.com> <20180628052209.13056-7-ravi.bangoria@linux.ibm.com> <20180702160158.GD65296@linux.vnet.ibm.com> <20180703192634.GA32223@redhat.com> Message-ID: <20d12c56-77f6-4d87-8498-d5bc090444e5@linux.ibm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 07/04/2018 12:56 AM, Oleg Nesterov wrote: > On 07/03, Ravi Bangoria wrote: >> >> Now about adding ref_ctr_offset into uprobe_consumer. Actually, I >> didn't want to change the uprobe_consumer definition because it's >> already exported and tools like systemtap are using it. > > So what? Yes, the out-of-tree modules should be updated, but this doesn't > mean we can add the new features. > > And, speaking of systemtap, it already has to do build-time checks to verify > that uprobe_consumer->ret_handler member exists. So it will need another > STAPCONF_INODE_REFCNT and that is all. Ok. let me explore that possibility as well. Thanks, Ravi