Date: Fri, 18 Jul 2008 19:27:05 -0400 From: "Edward Ruggeri" <smallhand@crawblog.com> To: "Robert Watson" <rwatson@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: 7.0 CURRENT kernel's ath driver causes page fault, kernel panic (debugging kernel) Message-ID: <919383240807181627y6b198e5bx160af1df9229181@mail.gmail.com> In-Reply-To: <20080718121102.D69806@fledge.watson.org> References: <919383240807172100j35e1c796q513fa34d83f8e8e0@mail.gmail.com> <20080718121102.D69806@fledge.watson.org>
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On Fri, Jul 18, 2008 at 7:25 PM, Edward Ruggeri <smallhand@crawblog.com> wrote: > On Fri, Jul 18, 2008 at 7:13 AM, Robert Watson <rwatson@freebsd.org> wrote: >> This is a NULL pointer dereference in the kernel, which almost certainly >> means a kernel bug. Per e-mail you've already received from Garrett Cooper, >> we need some further debugging information, such as a kernel astack trace. >> If you're unable to get a dump, a DDB stack trace would probably help quite >> a bit (options DDB, when it drops into the debugger, save the results of the >> command "trace"). Please do a file a PR with those results. > > Will do. I'll recompile the kernel tonight with the options Garrett's > recommended, get a trace, and file a PR. Thanks! > >> I'm a bit puzzled that your box is syncing after a panic -- normally the >> kernel is configured not to do that -- could kern.sync_on_panic be set in >> your loader.conf or sysctl.conf? > > Ah, I wondered if it was supposed to do that. There's nothing in > /etc/sysctl.conf, and only nvidia_load="YES" in /boot/loader.conf. I > ran sysctl -a subsequently, and it indicates that kern.sync_on_panic > is (currently) zero. I sent this to Robert Watson only, by mistake. My apologies for sending this twice to you now, Robert. Thank you very much for your help! -- Ned Ruggeri
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