[Bug 211713] NVME controller failure: resetting (Samsung SM961 SSD Drives)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713

--- Comment #64 from Warner Losh <imp at FreeBSD.org> ---
'sync' will force all the dirty buffers to be scheduled in the nvme controller
and won't return until they are complete. There are no other 'flush' operations
needed as the errors are that we suspend while we have pending I/O in the nvme
controller. That might need to be attended to, but it isn't currently.

But a suspend / resume bug is very different than this bug. Please file a new
bug to track that. This bug is, during normal operations, something bad
happens, and we stop being able to talk to the NVMe drive and error recovery is
insufficient to cope.

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