From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbguseast3.qq.com (smtpbguseast3.qq.com [54.243.244.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77103285068 for ; Mon, 17 Aug 2026 08:48:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.243.244.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786956525; cv=none; b=BZ0aq2z4Kf3EPegENdviVMEHktvawOUdmqlf19nBD1uczJ4Jg+kFsM/tNKpr+22tqCI51ufmGHbPPM6W+nHPExM7dN1/K//O9uxQOKB9N2YhXIzj01AKB6+gJYZpRmq3P5jAFjIiK0gEj3C84d8XbdRJAUIpOTh1n+px4fFzE9M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786956525; c=relaxed/simple; bh=sBEqRV+X3NJ+d00hspKPL+K2GPhjRi1NUVyJkyc0LH0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aCExyESrJr+KVK0MY5dCsADcYba0VACF8QnTK/k7KlU3iw5/cYccAknLLG0qAXTsMjrzGQjC+69IUZcZ+gj8kpeGXinJvw1WlRdvvVwxLFbJI2+MHqGw8kW3YS7IGvQioKcwdkKHX3pHl3bdicdF6czxtAOS4+q2I8VeEr9c3cw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=U0ohtq5k; arc=none smtp.client-ip=54.243.244.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="U0ohtq5k" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1786956433; bh=ShiEhLjgdRYcBEILZagrMbIlp206gnNqakMCvdm4POo=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=U0ohtq5k2ynC2DVuGOYZuZjrJvdmRWGHQU45bXsFROpB+VQBqU1snBPHPxfWgjcGG K02y0hK8klRLPyKUmNIW95DbTHg9wCEqNiGAnUowxv7c5005WYrZM5+HLhIFasko50 PTr3fCZY0mqUanNObIqwBp++RRimn9EmyHiLVs9E= X-QQ-mid: esmtpgz13t1786956424t3965a016 X-QQ-Originating-IP: TeRbYOE0z7epXa4Si/rfgGT/K8pzRUT/IIHKSyAVVyQ= Received: from localhost.localdomain ( [113.57.152.160]) by bizesmtp.qq.com (ESMTP) with id ; Mon, 17 Aug 2026 16:47:02 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 3178264705605889229 From: Wentao Guan To: vincent.mc.li@gmail.com Cc: alexei.starovoitov@gmail.com, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, loongarch@lists.linux.dev, martin.lau@linux.dev Subject: Re: bpf selftests timer_lockup intermittently locks up kernel Date: Mon, 17 Aug 2026 16:47:01 +0800 Message-Id: <20260817084701.2600044-1-guanwentao@uniontech.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: esmtpgz:uniontech.com:qybglogicsvrgz:qybglogicsvrgz3a-0 X-QQ-XMAILINFO: OHUP+eFjYHonn6hGGyhyqQXl85sHg+dnF0ZApoDdl9v/RzYNp7VFQ7d6 OS/PQcQ4nDSLIromW4ldFQlxTQQ+/i1ulG5VHanA6wybU3icw/8k6MZ4CZy6dJ6FsD8d91x Cg6lE4A2qSjZh7tpCiMRqq8OLO3p0gl4yCywD0R+OYUL8/0eGQ+i2rUjJqZuK8dt/FCn/4k j2f1W9AjnwQwVuj2JbvirET/1fTT7Iln/FcjkUdTnvhKJPjjloXZkajWuDyy7xA3HBP2c0Y URB/iEsFufat2GlkqYtZLAeapuxU865W1xIHWiqbBmDCd3sfBsVlGK8ndy6UVSqkkWy7bzM 0Q64WgGcepR7vKpxfJDLhVTLJjhm2up7mnNiwVn5el/gI8tl3ZDF/fdX2SA3ZhnDIDc486P /VFR/ECHTU/9XKJjwNBjmWZMMY0SCtPPOEAf/0a8fWUMcewgREAXlesvVxpfdRX1gCBX2tm TfcHDqfTLt7xZX1xiEB6LJwYUzznCh42TJUtCWLBoy5j1Uro/bS4DgtV8EoU4dWkxpaPUjm 2/BKWFp9kVVmSZjcuEdfXnRgoBCIkUHep0nvB9wD8OYarqoJmP4+953t0ltOzsmcH1tZD5P D19SOZaAlbF9k3An8Cw3s7+uCZ/CuKe6edwngvTT8w4fUpk7LPysG2DSeSEcNVONY1sAnN7 OpfQgZl5Xr7AA1X/9JTltOLW8/Kh5WZV85L3zYXu2luxTwAAqYlb5ODIFDi3wppQXzx/Qhi aa5i/LAsunh95A0zfNCtSVghedLzgv1286Tzz8++Oim+s7WNojpfOK0evaTrJ+dY9fCgFmu JVJQ5o2hD5TUJ7eECfKC2l7KHyVMjQGYE6oGzNMSnXie2HXDR+JfCyDKJ17os+TXO64FCyU wqIRvROK9w2aKnfw1MzXGtB7/o9vRyIBys8ZIoASo769Si4N4CBM9qJi/laYIqMy1z8OVj9 ahpcjcGuND5f+6Fmfy0sYPE84FbWOB+QClwRfX4p7OpGUKK866zTrTzSNO1u0snukBHnKb5 M+nTxctAm52HBhyyb8g3sgCRDEBDo= X-QQ-XMRINFO: NI4Ajvh11aEjEMj13RCX7UuhPEoou2bs1g== X-QQ-RECHKSPAM: 0 Hello, You may try netconsole to capture the crash log: Reproducer Kernel config: CONFIG_NETCONSOLE + CONFIG_NETCONSOLE_DYNAMIC=y Recv server: run: nc -u -l -p 6666 | tee /tmp/klog.txt Reproducer: 1. modprobe netconsole/or y(skip) 2. mount -t configfs none /sys/kernel/config or mounted(skip) 3. mkdir /sys/kernel/config/netconsole/target1 4. cd /sys/kernel/config/netconsole/target1 5. echo 192.168.1.10 > local_ip # 192.168.1.10 is reproducer ip 6. echo 6666 > local_port 7. echo 6666 > remote_port 8. echo 192.168.1.20 > remote_ip $ recv ip 9. echo 1 > enabled 10. echo 8 > /proc/sys/kernel/printk 11. optional: echo xxx > /dev/kmsg to test BRs Wentao Guan