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DM6PR10MB4313.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2025 08:23:22.9318 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: e37klu5V89vaF0hL5nOPx+f44OcrVHW1Xvw3X5v6szp814XduVFLv2PrcbQjY30Bqj8MN+nQayPG6WRIL4muPg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR10MB6118 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-13_03,2025-01-13_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 spamscore=0 suspectscore=0 phishscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2411120000 definitions=main-2501130071 X-Proofpoint-GUID: rfVWLIDE9GLZoEWcHnzx8hyaCPndbYcZ X-Proofpoint-ORIG-GUID: rfVWLIDE9GLZoEWcHnzx8hyaCPndbYcZ On 13/01/2025 01:58, Ming Lei wrote: > sysfs ->store is called with queue freezed, meantime we have several > ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate > memory with GFP_KERNEL which may run into direct reclaim code path, > then potential deadlock can be caused. > > Fix the issue by marking NOIO around sysfs ->store() > > Reported-by: Thomas Hellström > Cc:stable@vger.kernel.org > Signed-off-by: Ming Lei I guess that you should be including a link to https://lore.kernel.org/linux-block/Z4RkemI9f6N5zoEF@fedora/T/#mc774c65eeca5c024d29695f9ac6152b87763f305 Regardless, FWIW: Reviewed-by: John Garry