Date: Sun, 17 Jul 2016 09:57:16 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Wolfgang Zenker <wolfgang@lyxys.ka.sub.org>, FreeBSD Release Engineering Team <re@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: ath (AR9460) no longer works after going to 11-STABLE r302483 Message-ID: <CAJ-Vmo=K-ivMYN4iT3FMgXZxJzA3CJ=qRRV1gFG07EHxS9pwFQ@mail.gmail.com> In-Reply-To: <20160717104755.GA74205@lyxys.ka.sub.org> References: <CAJ-Vmo=MYR9H=h2j9b1_ruOwfssJnwEVJRL27UvqFEWdf1rB2Q@mail.gmail.com> <20160710174746.GA29034@lyxys.ka.sub.org> <20160710175300.GB29034@lyxys.ka.sub.org> <CAJ-VmokcVnMYr6cnznQKDPr=viViBUe09Hp7H5P7kmZSAxnjPQ@mail.gmail.com> <20160714213758.GA17141@lyxys.ka.sub.org> <CAJ-VmomyruQwO0sLEEvi=ymcFiegCOriaTvSF7bcRQfe7ftPhA@mail.gmail.com> <20160715202803.GA38281@lyxys.ka.sub.org> <CAJ-VmomVdP2XxL1Z9cje_yk5d3N18vofQb5i6WELCumaN6XAsA@mail.gmail.com> <20160716093010.GA50786@lyxys.ka.sub.org> <CAJ-VmomF6CvSriHu87uRnzqZJf7JhyHJz8gLVF-mWNoiZfsqFw@mail.gmail.com> <20160717104755.GA74205@lyxys.ka.sub.org>
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ok, I'll go try a stable/11 install on a device with an AR9462 and report back. re@, I know its late notice, but i'd really like this fixed in stable/11, so heads up for whenever I figure out what broke! -a On 17 July 2016 at 03:47, Wolfgang Zenker <wolfgang@lyxys.ka.sub.org> wrote: > * Adrian Chadd <adrian@freebsd.org> [160716 17:52]: >> ... > >> I'm confused as to what's going on.. > > smells like a race condition unmasked by changed timing to me. > But I admit I have no clue at all how that wlan stuff works and if > it is even possible for such a race condition to exist, much less > how to debug this. > >> On 16 July 2016 at 02:30, Wolfgang Zenker <wolfgang@lyxys.ka.sub.org> wrote: >> > Hi, >> > >> > * Adrian Chadd <adrian@freebsd.org> [160715 22:40]: >> >> On 15 July 2016 at 13:28, Wolfgang Zenker <wolfgang@lyxys.ka.sub.org> wrote: >> >>> * Adrian Chadd <adrian@freebsd.org> [160715 00:00]: >> >>>> On 14 July 2016 at 14:37, Wolfgang Zenker <wolfgang@lyxys.ka.sub.org> wrote: >> >>>>> * Adrian Chadd <adrian@freebsd.org> [160710 21:47]: >> >>>>>> Since you've reverted the ath driver directories without success, I'm >> >>>>>> mostly out of simple ideas. I think you need to bisect the whole >> >>>>>> kernel version until you find the commit that broke things. >> > >> >>>>> done. The commit is 11-STABLE r302410. AFAICS the only change here >> >>>>> is the removal of debugging options from the GENERIC kernel config: >> > >> >>>>> https://svnweb.freebsd.org/base/stable/11/sys/amd64/conf/GENERIC?r1=302408&r2=302410 >> > >> >>>> ... loool, okay. Let me see. >> > >> >>>> Try INVARIANTS and INVARIANT_SUPPORT. Maybe something in the ath >> >>>> driver needs it.. oops! >> > >> >>> Nope, wlan0 still works after disabling INVARIANTS and INVARIANT_SUPPORT. >> >>> Any suggestions for next try? >> > >> >> Just try disabling the others and see what happens. >> > >> > commenting out DEADLKRES and MALLOC_DEBUG_MAXZONES in addition to >> > INVARIANTS and INVARIANT_SUPPORT did not change the situation: ath >> > still worked. Re-enabling all of the above and disabling WITNESS >> > resulted in ath failing. >> > >> > Wolfgang
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