On (24/10/19 21:09), Ming Lei wrote: > On Sat, Oct 19, 2024 at 09:58:04PM +0900, Sergey Senozhatsky wrote: > > On (24/10/19 20:50), Ming Lei wrote: > > > On Sat, Oct 19, 2024 at 09:37:27PM +0900, Sergey Senozhatsky wrote: [..] > > Then we need to root-cause it first. > > If you can reproduce it I cannot. All I'm having are backtraces from various crash reports, I posted some of them earlier [1] (and in that entire thread). This loos like close()->bio_queue_enter() vs usb_disconnect()->del_gendisk() deadlock, and del_gendisk() cannot drain. Doing drain under the same lock, that things we want to drain currently hold, looks troublesome in general. [1] https://lore.kernel.org/linux-block/20241008051948.GB10794@xxxxxxxxxx
