Hi Bart, On 8/19/22 16:49, Bart Van Assche wrote: > On 8/19/22 05:01, Hans de Goede wrote: >> I've been dogfooding 6.0-rc1 on my main workstation and I have hit >> this pretty serious bug, serious enough for me to go back to 5.19 >> >> My dmesg is showing various blk_mq (RCU?) related lockdep splats >> followed by some tasks getting stuck on disk-IO. E.g. "sync" >> is guaranteed to hang, but other tasks too. >> >> This seems to be mainly the case on "sd" disks (both sata >> and USB) where as my main nvme drive seems fine, which has >> probably saved me from worse issues... >> >> Here are 4 task stuck reports from my last boot, where >> I had to turn off the machine by keeping the power button >> pressed for 4 seconds. >> >> [ ... ] >> >> Sorry for not being able to write a better bug-report but I don't have >> the time to dive into this deeper. I hope this report is enough for >> someone to have a clue what is going on. > > Thank you for the detailed report. I think this report is detailed enough to root-cause this issue, something that was not possible before this report. > > Please help with verifying whether this patch fixes this issue: "[PATCH] scsi: sd: Revert "Rework asynchronous resume support"" (https://lore.kernel.org/linux-scsi/20220816172638.538734-1-bvanassche@xxxxxxx/). Thanks that is very useful. I'm running 6.0-rc1 with this patch added now and so far I've not seen the problem re-occur. I was also seeing 6.0 suspend/resume issues on 2 laptops with sata disks (rather then NVME) which I did not yet get around to collecting logs from / reporting. I'm happy to report that those suspend/resume issues are also fixed by this. I'll reply to the patch with my Tested-by for this. Regards, Hans
