[Bug 211381] L2ARC degraded, repeatedly, on Samsung SSD 950 Pro nvme

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211381

--- Comment #8 from Andriy Gapon <avg at FreeBSD.org> ---
(In reply to braddeicide from comment #7)
> io_error = 22 io_offset = 0 io_size = 0

This looks really strange.  I am not sure why L2ARC code would issue such
zio-s.
Ah, it's actually a parent zio of all zio-s for individual buffers written in a
pass.  If a single child zio fails, then the parent zio is marked as failed
too.

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