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Thu, 17 Jul 2025 14:28:41 +0000 (GMT) Message-ID: <94ca52fd-2c16-4e3a-b0ad-8ced1c4526a9@linux.ibm.com> Date: Thu, 17 Jul 2025 19:58:40 +0530 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bug report] kmemleak issue observed during blktests To: Yi Zhang Cc: Ming Lei , Yu Kuai , Jens Axboe , linux-block , Shinichiro Kawasaki , "yukuai (C)" References: <08f3f802-e3c3-b851-b4ee-912eade04c6f@huaweicloud.com> <99b5326f-7ef6-46d8-a423-95b1b4e7c7fb@linux.ibm.com> Content-Language: en-US From: Nilay Shroff In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: RSR96gcmVwe_XjTh0nZRWXcc4u--y-rX X-Authority-Analysis: v=2.4 cv=LoGSymdc c=1 sm=1 tr=0 ts=6879089f cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=lRhqbHx4yJLUIVgMKPkA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: RSR96gcmVwe_XjTh0nZRWXcc4u--y-rX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzE3MDEyNiBTYWx0ZWRfX/5L1q3BALyf0 zd6+88JrSLH/QfqZG9ASP7fOLET3ESRDIyv8fcrOjpQMJYElcltdB7cFEp8W8lAyf7Wz4987wf8 tmcFu1eWw0rWiXFVUmMG7YzdPSDs+0VLTt8ntkKueT9LBDoum1fuQU814q1RffmBLME75fd03Iw KxXRIBr3GqUPhZTVYM8MDIGVz1ux7nCuWMPwI5awZi/Bykdh0TJ2eI2+Zeyb225FKvxg/VCdYoG tmpMP3eKo51LKamRqY6AHl4/DL96xRSuo+j7zjU4JfAOuh/GcjLFM8B/wR6L7qcIY/jldz13Rm8 s9WyXXIG6Mt9tADNdYIn+vFFmnZhvIh3s5WGuYfykxhCUlJLGnxYC+sEFLYXzpjDN1FN6d7UqFj 012qMgabt0F93qkyTJAC1tAsnOzDKv4hInhncraHBg6cqvRR9Kpjqb8pWTYaxHRjSamC2zIl 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=2025-07-17_01,2025-07-17_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 impostorscore=0 clxscore=1015 phishscore=0 mlxlogscore=880 priorityscore=1501 suspectscore=0 mlxscore=0 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-2507170126 On 7/17/25 7:55 PM, Yi Zhang wrote: > > Hi Nilay > > How about update the patch with the below trace which doesn't have nbd info: > > unreferenced object 0xffff8881b82f7400 (size 512): > comm "check", pid 68454, jiffies 4310588881 > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace (crc 5bac8b34): > __kvmalloc_node_noprof+0x55d/0x7a0 > sbitmap_init_node+0x15a/0x6a0 > kyber_init_hctx+0x316/0xb90 > blk_mq_init_sched+0x419/0x580 > elevator_switch+0x18b/0x630 > elv_update_nr_hw_queues+0x219/0x2c0 > __blk_mq_update_nr_hw_queues+0x36a/0x6f0 > blk_mq_update_nr_hw_queues+0x3a/0x60 > 0xffffffffc09ceb80 > 0xffffffffc09d7e0b > configfs_write_iter+0x2b1/0x470 > vfs_write+0x527/0xe70 > ksys_write+0xff/0x200 > do_syscall_64+0x98/0x3c0 > entry_SYSCALL_64_after_hwframe+0x76/0x7e > unreferenced object 0xffff8881b82f6000 (size 512): > comm "check", pid 68454, jiffies 4310588881 > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace (crc 5bac8b34): > __kvmalloc_node_noprof+0x55d/0x7a0 > sbitmap_init_node+0x15a/0x6a0 > kyber_init_hctx+0x316/0xb90 > blk_mq_init_sched+0x419/0x580 > elevator_switch+0x18b/0x630 > elv_update_nr_hw_queues+0x219/0x2c0 > __blk_mq_update_nr_hw_queues+0x36a/0x6f0 > blk_mq_update_nr_hw_queues+0x3a/0x60 > 0xffffffffc09ceb80 > 0xffffffffc09d7e0b > configfs_write_iter+0x2b1/0x470 > vfs_write+0x527/0xe70 > ksys_write+0xff/0x200 > do_syscall_64+0x98/0x3c0 > entry_SYSCALL_64_after_hwframe+0x76/0x7e > unreferenced object 0xffff8881b82f5800 (size 512): > comm "check", pid 68454, jiffies 4310588881 > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > backtrace (crc 5bac8b34): > __kvmalloc_node_noprof+0x55d/0x7a0 > sbitmap_init_node+0x15a/0x6a0 > kyber_init_hctx+0x316/0xb90 > blk_mq_init_sched+0x419/0x580 > elevator_switch+0x18b/0x630 > elv_update_nr_hw_queues+0x219/0x2c0 > __blk_mq_update_nr_hw_queues+0x36a/0x6f0 > blk_mq_update_nr_hw_queues+0x3a/0x60 > 0xffffffffc09ceb80 > 0xffffffffc09d7e0b > configfs_write_iter+0x2b1/0x470 > vfs_write+0x527/0xe70 > > ksys_write+0xff/0x200 > do_syscall_64+0x98/0x3c0 > entry_SYSCALL_64_after_hwframe+0x76/0x7e > Sure, I will send another patch with the updated commit message. Thanks, --Nilay