On Sat, 15 May 2021 16:03:15 +0900, Shin'ichiro Kawasaki wrote:
> The BUG message "BUG: using smp_processor_id() in preemptible [00000000]
> code" was observed for TCMU devices with kernel config DEBUG_PREEMPT.
>
> The message was observed when blktests block/005 was run on TCMU devices
> with fileio backend or user:zbc backend [1]. The commit 1130b499b4a7
> ("scsi: target: tcm_loop: Use LIO wq cmd submission helper") triggered
> the symptom. The commit modified work queue to handle commands and
> changed 'current->nr_cpu_allowed' at smp_processor_id() call.
>
> [...]
Applied to 5.13/scsi-fixes, thanks!
[1/1] scsi: target: Avoid smp_processor_id() in preemptible code
https://git.kernel.org/mkp/scsi/c/70ca3c57ff91
--
Martin K. Petersen Oracle Linux Engineering
