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Tue, 5 Aug 2025 13:33:33 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 28F0820040; Tue, 5 Aug 2025 13:33:33 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D1ECE20043; Tue, 5 Aug 2025 13:33:32 +0000 (GMT) Received: from [9.152.212.130] (unknown [9.152.212.130]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 5 Aug 2025 13:33:32 +0000 (GMT) Message-ID: Date: Tue, 5 Aug 2025 15:33:32 +0200 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 0/2] perf/s390: Regression: Move uid filtering to BPF filters To: Ilya Leoshkevich , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Ian Rogers , Arnaldo Carvalho de Melo Cc: bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Jiri Olsa , Heiko Carstens , Vasily Gorbik , Alexander Gordeev References: <20250805130346.1225535-1-iii@linux.ibm.com> Content-Language: en-US From: Thomas Richter Organization: IBM In-Reply-To: <20250805130346.1225535-1-iii@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VzYPxEk3MH6z5mhoijh3zxHoZBxHj3A1 X-Authority-Analysis: v=2.4 cv=M65NKzws c=1 sm=1 tr=0 ts=68920832 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=x4kxwI2lhZTCVj833_4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: lFywGRcWcmvqzRw6TgqJnpF-1_omxDDx X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODA1MDA5OCBTYWx0ZWRfX/JUmhlJGaScL JmIS897DyYzSl5vniS0kcdEOvvfuXm/rNxL9WWj3zfsbIuUuAvrYi2sxdUgMnmJNpQ+wIltZaOc LpFxeGSm1LUsARqQ9a38rvITQnAFj94LS0kmJ3Pz+frmA+SuZV0n/U+eTchgCjT5wtDAl2g3md1 EvQ8cDyjqcizOQntII/s0MKQ5cxv0TkQbzf1zJo1YvujEcnjtCRRjlmRVjg2ljO4g8Q6gkkcXtP MjTH5vNmUzeG1D+1SIHUyRK2iSuBwEDCKeCAIfNAexWJru4eq0onAE9puB14GAYmvlMjOvfttq0 JhbVNH29ra7i3dCQPZ07cyYtOBi7jyDmvXrt0eeYiEk7+8OvJy+iZ5S74G9isYWG/JAfU5iy26E 7e5As72B0pLwSzWnDo7y+Go8Z3nu2qIr/CfyTSUTiRlP/dCJYdKSVBIYd2zLZoGd4iZa101z X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-05_03,2025-08-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1011 mlxscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 adultscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2508050098 On 8/5/25 14:54, Ilya Leoshkevich wrote: > v2: https://lore.kernel.org/bpf/20250728144340.711196-1-tmricht@linux.ibm.com/ > v2 -> v3: Use no_ioctl_enable in perf. > > v1: https://lore.kernel.org/bpf/20250725093405.3629253-1-tmricht@linux.ibm.com/ > v1 -> v2: Introduce no_ioctl_enable (Jiri). > > Hi, > > This series fixes a regression caused by moving UID filtering to BPF. > The regression affects all events that support auxiliary data, most > notably, "cycles" events on s390, but also PT events on Intel. The > symptom is missing events when UID filtering is enabled. > > Patch 1 introduces a new option for the > bpf_program__attach_perf_event_opts() function. > Ppatch 2 makes use of it in perf, and also contains a lot of technical Typo Patch > details of why exactly the prolblem is occurring. Typo problem > > Thanks to Thomas Richter for the investigation and the initial version > of this fix, and to Jiri Olsa for suggestions. > > Best regards, > Ilya > > Ilya Leoshkevich (2): > libbpf: Add the ability to suppress perf event enablement > perf bpf-filter: Enable events manually > > tools/lib/bpf/libbpf.c | 13 ++++++++----- > tools/lib/bpf/libbpf.h | 4 +++- > tools/perf/util/bpf-filter.c | 5 ++++- > 3 files changed, 15 insertions(+), 7 deletions(-) > Thanks for taking over!!! For the whole series Tested-by: Thomas Richter -- Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany -- IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Wolfgang Wendt Geschäftsführung: David Faller Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294