[Bug 200459] [nvme] Ioctl for passthrough can hang if called during nvme reset.

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200459

Juraj Lutter <juraj at lutter.sk> changed:

           What    |Removed                     |Added
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                 CC|                            |juraj at lutter.sk

--- Comment #1 from Juraj Lutter <juraj at lutter.sk> ---
I'm seeing something similar, a box with 22x nvme and 2x SSD, running either
12-STABLE or 13-CURRENT (as of today). After certain amount of time (and
workload), ioctls are hanging, rendering the box almost unresponsive to some
operations.

ddb showed that there are two suspects:
mrsas_ocr_thread()
nvme_ctrlr_passthrough_cmd()

the rest of processes and threads are in sched_switch()

OCR is Online Controller Reset.

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