Date: Wed, 17 Oct 2007 19:39:02 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Bengt Ahlgren <bengta@sics.se> Cc: stable@freebsd.org Subject: Re: Reproducable, possibly NFS related, fatal double fault in 6.2-R-p7 Message-ID: <471648B6.5020602@FreeBSD.org> In-Reply-To: <uh7y7e29mfv.fsf@P142.sics.se> References: <20071004165755.GA1049@pp.htv.fi> <47120D83.1010703@FreeBSD.org> <20071015203202.GA17964@pp.htv.fi> <uh7y7e29mfv.fsf@P142.sics.se>
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Bengt Ahlgren wrote: > Esa Karkkainen <ejk@iki.fi> writes: > >> On Sun, Oct 14, 2007 at 02:37:23PM +0200, Kris Kennaway wrote: >>> Esa Karkkainen wrote: >>>> I get "Fatal double fault" error when writing to a filesystem >>>> mounted from NFS server. >> I got an offlist reply in which he suggested that the problem might be >> in nve driver. > > That was me. I indeed got the same fault when running NFS over nve. > Switching to nfe solved the problem for me. The on-screen backtrace > reveals the true location of the problem. See: > > http://www.sics.se/~bengta/FBSD/DSC00585.JPG > > I do have a dump, but for some reason kgdb is not able to show the > same information. If you're using a module you have to do extra (but documented) steps. Or maybe kgdb has forgotten how to decode a double fault. Anyway, this information is indeed definitive, and it's what others seeing this problem need to provide if they still have doubts. Krishome | help
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