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Wed, 5 Nov 2025 19:16:32 +0000 (GMT) From: Ilya Leoshkevich To: Arnaldo Carvalho de Melo Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Ilya Leoshkevich Subject: [PATCH 0/5] perf jitdump: Fix PID namespace detection Date: Wed, 5 Nov 2025 20:10:23 +0100 Message-ID: <20251105191626.34998-1-iii@linux.ibm.com> X-Mailer: git-send-email 2.51.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=StmdKfO0 c=1 sm=1 tr=0 ts=690ba295 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=NEAV23lmAAAA:8 a=tx5xmjFgT45qxv5mxtEA:9 a=HhbK4dLum7pmb74im6QT:22 X-Proofpoint-ORIG-GUID: kdCZXqxewA3LZw2kN-LW9yDv65iPQ4cv X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTAxMDAxOCBTYWx0ZWRfX8/orXbj7ynsA RiHvBgD5H3i2shUwsBj+9z/B/KGLeOyXCJWjr6UDR7GRlyeD95xbjI0dbJbxG/lDaqmPS0c2f2z 5xhtp3belsPO0urvrx3xIi2r5qRuCigRV6L0K1FIfAjUFQXGYPWOnQbr1SmRTvJ7K0qXaxw0ReJ 9odwPaY9XFAkc00lKk1sa69Cv8sTkQ+kb+ra79vmghnfZLlg6nJiklycEdHB/brFOgZP+P8Yey1 OGkiTMfTV77ZHmSA0nYNG+dVxeutngOMd8v5d2CZmYswH9xB13y3TkLpgukhaar5/6/aCV/o9NR RVVlfwvtHh4MzWK00xD+Equz13VCckSTHiGXR4bdmNC2n+KXftxO5RtNoCz5OgIINcWlr5fu1FW UNnKnndIU4H8T6iRBYX6S4cAg3A2Wg== X-Proofpoint-GUID: kdCZXqxewA3LZw2kN-LW9yDv65iPQ4cv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-05_07,2025-11-03_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 phishscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 adultscore=0 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511010018 Hi, I ran into a problem with perf jitdump not working with still running namespaced processes and started (very slowly) working on a series that allows perf to record accurate PID namespace information [1] and use that instead of resorting to guesswork. However, I realized that at least short-term it's possible to fix the existing heuristic, so I've created this series. Patch 1 is the fix. Patches 2-4 are small changes to the existing test, and patch 5 adds a test that reproduces the situation that I'm facing. [1] https://github.com/iii-i/linux/commits/iii/wip/nspid/ Best regards, Ilya Ilya Leoshkevich (5): perf jitdump: Fix PID namespace detection perf test java symbol: Get rid of shellcheck warnings perf test java symbol: Extract LIBJVMTI detection perf test java symbol: Fix a false negative in symbol regex perf test java symbol: Add PID namespace variant tools/perf/tests/shell/lib/setup_libjvmti.sh | 18 +++ tools/perf/tests/shell/test_java_symbol.sh | 39 +++-- .../tests/shell/test_java_symbol_pidns.sh | 135 ++++++++++++++++++ tools/perf/util/jitdump.c | 27 +++- tools/perf/util/namespaces.c | 9 ++ tools/perf/util/namespaces.h | 2 + 6 files changed, 201 insertions(+), 29 deletions(-) create mode 100644 tools/perf/tests/shell/lib/setup_libjvmti.sh create mode 100755 tools/perf/tests/shell/test_java_symbol_pidns.sh -- 2.51.1