Date: Wed, 7 Sep 2011 12:53:25 +0200 From: Joel Dahl <joel@vnode.se> To: Bernhard Schmidt <bschmidt@freebsd.org> Cc: freebsd-wireless@freebsd.org, current@freebsd.org Subject: Re: BETA2 panic Message-ID: <20110907105325.GQ52426@goofy03.vnode.local> In-Reply-To: <CAAgh0_bOOT2j_y4AeJHpXQty36Gb32pYq_atyf6j9QqnhqeCsA@mail.gmail.com> References: <09C13664-4FC0-41F3-8849-CE875B3A6CC0@vnode.se> <CAJ-VmokggV3r8cStQNOMRCKoWMF1tPsoXW6PhHPxSq-i8Pyf-Q@mail.gmail.com> <20110905062453.GM52426@goofy03.vnode.local> <CAAgh0_b6WKYQSyT22MegzxaEsdQBiP0huWgQC%2B9a7yAFvWdYJw@mail.gmail.com> <20110906204242.GP52426@goofy03.vnode.local> <CAAgh0_bOOT2j_y4AeJHpXQty36Gb32pYq_atyf6j9QqnhqeCsA@mail.gmail.com>
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On 07-09-2011 10:59, Bernhard Schmidt wrote: > On Tue, Sep 6, 2011 at 22:42, Joel Dahl <joel@vnode.se> wrote: > > On 05-09-2011 9:02, Bernhard Schmidt wrote: > >> On Mon, Sep 5, 2011 at 08:24, Joel Dahl <joel@vnode.se> wrote: > >> > On 05-09-2011 5:09, Adrian Chadd wrote: > >> >> On 5 September 2011 01:04, Joel Dahl <joel@vnode.se> wrote: > >> >> > Hi, > >> >> > > >> >> > I upgraded my laptop from BETA1 to rev. 225367 today, and now my laptop panics just a few minutes after booting. This is 100% reproducible, it panics every time. > >> >> > > >> >> > I've got a pic with the backtrace here: http://www.vnode.se/sc/panic_20110904.jpg > >> >> > >> >> Hi, > >> >> > >> >> There weren't many commits between BETA1 and -HEAD in the wireless > >> >> area; would you please do a binary search of the kernel revisions (no > >> >> need to do full buildworlds) to find which commit broke it? > >> > > >> > Yes, I'll do that tonight. > >> > >> While doing so, can you enable at least some debugging? > >> wlandebug +state > >> or even better > >> wlandebug 0xffffffff > >> > >> It smells like that something is poking the SW bmiss handler while not > >> in RUN state and therefore you're hitting a KASSERT(). Question is if > >> the bmiss timer isn't stopped/drained somewhere or if there is too > >> excessive call. > > > > Exactly what in the wlandebug output are you looking for? I've posted a pic > > at http://www.vnode.se/sc/panic_20110906.jpg showing what it looks like right > > before the panic. This is with "wlandebug 0xffffffff". > > Thanks, so, looks like it is scanning while the panic happens. At that > point it should actually never ever care about beacon misses.. this is > strange, really. > > Can you try to comment out the call to ieee80211_beacon_miss() on line > 2936 in if_iwn.c? If the panic no longer happens the issue is > somewhere in the conditions before that call. Hm, this is with bwn(4), not iwn(4). :) -- Joel
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