Date: Fri, 26 Oct 2007 12:22:23 +0200 From: Bengt Ahlgren <bengta@sics.se> To: Kris Kennaway <kris@FreeBSD.org> Cc: stable@FreeBSD.org Subject: Re: Reproducable, possibly NFS related, fatal double fault in 6.2-R-p7 Message-ID: <uh7fxzykwf4.fsf@P142.sics.se> In-Reply-To: <471648B6.5020602@FreeBSD.org> (Kris Kennaway's message of "Wed, 17 Oct 2007 19:39:02 %2B0200") References: <20071004165755.GA1049@pp.htv.fi> <47120D83.1010703@FreeBSD.org> <20071015203202.GA17964@pp.htv.fi> <uh7y7e29mfv.fsf@P142.sics.se> <471648B6.5020602@FreeBSD.org>
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Kris Kennaway <kris@FreeBSD.org> writes: > 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. Just for the record: if_nve was compiled into the kernel. Bengt
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