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From: John Baldwin <jhb@freebsd.org>
To: freebsd-drivers@freebsd.org
Cc: Matthew Ahrens <mahrens@delphix.com>, Marc Goroff <Marc.Goroff@quorum.net>
Subject: Re: NVME panic
Date: Tue, 20 Oct 2015 11:29:09 -0700
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On Wednesday, October 14, 2015 09:52:53 PM Matthew Ahrens wrote:
> I'm not sure if this is the right place to ask, so please redirect me if
> necessary.
> 
> An associate of mine (cc'd) is hitting panics in the NVME driver when using
> FreeBSD 10.2-RELEASE.  He's using the NVME driver for ZFS cache (L2ARC) and
> log (ZIL/SLOG) devices, and he wasn't seeing any problems with it on 10.1.
> He filed a bug but I was wondering if there's anything more we can do to
> bring this to the attention of someone who might be able to help with it.
> 
> The bug is https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203746, and
> the panic is in nvme_bio_child_done().

Jim Harris works on the team at Intel that maintains nvme(4).  I've added him
to the bug report.  On first glance it seems like bio_driver1 might have been
NULL in the completed request?

-- 
John Baldwin