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Mon, 15 Jun 2020 18:27:48 +0000 From: Song Liu To: Steven Rostedt CC: Peter Zijlstra , linux-kernel , Kernel Team , Ingo Molnar , Arnaldo Carvalho de Melo , "Masami Hiramatsu" , Mark Rutland , "Jiri Olsa" , Namhyung Kim , Alexey Budankov Subject: Re: [RFC] perf/core: allow ftrace for functions in kernel/event/core.c Thread-Topic: [RFC] perf/core: allow ftrace for functions in kernel/event/core.c Thread-Index: AQHWM6ViVS5deg/n5kWgZSYX+yJPDqi65OeAgAACB4CAAAIsgIAAAuWAgA+1r4CAAAEBAIAPe1mA Date: Mon, 15 Jun 2020 18:27:48 +0000 Message-ID: References: <20200526212826.4097888-1-songliubraving@fb.com> <20200526213913.GG2483@worktop.programming.kicks-ass.net> <20200526215415.GH2483@worktop.programming.kicks-ass.net> <20200526180437.45aed950@gandalf.local.home> <595AB855-8E84-4367-AEEC-C140F035C9B4@fb.com> <20200605180222.6cc3b34c@oasis.local.home> In-Reply-To: <20200605180222.6cc3b34c@oasis.local.home> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3608.80.23.2.2) authentication-results: goodmis.org; 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x-ms-exchange-antispam-messagedata: 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 Content-Type: text/plain; charset="us-ascii" Content-ID: <5A72E9A55F0587418F9B93313FF471F9@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: af508230-aa42-4981-56f0-08d81159ce65 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Jun 2020 18:27:48.3855 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: /mJy+WZqkumd8EFCKrRyXSQiuUIV1msdEHX2QUckA1GE5EZAPaEVbjwKVPh5XpORuAcmklTIh5nuR3sZM9QmHA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB2408 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_07:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 spamscore=0 cotscore=-2147483648 mlxscore=0 adultscore=0 bulkscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 mlxlogscore=901 lowpriorityscore=0 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150137 X-FB-Internal: deliver Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Steven, > On Jun 5, 2020, at 3:02 PM, Steven Rostedt wrote: >=20 > On Fri, 5 Jun 2020 21:58:48 +0000 > Song Liu wrote: >=20 >>=20 >> How does this work in your tests?=20 >=20 > I started it, but got distracted by other work. It did not crash with > the little testing I did do. I wanted to also look at my patch that > adds tracing to the ftrace directory too. >=20 > I'll try to remember to address this some more next week. Feel free to > ping me again then. Have you got chance to run these tests? Thanks, Song