Date: Mon, 22 Aug 2011 14:35:49 -0700 From: YongHyeon PYUN <pyunyh@gmail.com> To: Garrett Cooper <yanegomi@gmail.com> Cc: mdf@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org>, Pyun YongHyeon <yongari@freebsd.org> Subject: Re: Deterministic panic due to non-sleepable lock with if_alc when reconfiguring interfaces Message-ID: <20110822213549.GC4452@michelle.cdnetworks.com> In-Reply-To: <CAGH67wRunM53CTsAAdeK0ogLYUqyE4mQSDosCsy2vF-Skd4r3w@mail.gmail.com> References: <CAGH67wRWVu0qtae7fZjAi9r1H=Tt2QYpgJgF=1stUuWe1dg%2BSw@mail.gmail.com> <CAMBSHm-R0QBCy_FshgXq=neeAaHFTYStWkE=AcJ7NngNchvwxQ@mail.gmail.com> <CAGH67wRPNygNw0h5L73U21jQnAvkr6NM7ASJM=bvXocxZgPo6Q@mail.gmail.com> <20110821234856.GB1755@michelle.cdnetworks.com> <20110822204054.GB4452@michelle.cdnetworks.com> <CAGH67wRunM53CTsAAdeK0ogLYUqyE4mQSDosCsy2vF-Skd4r3w@mail.gmail.com>
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On Mon, Aug 22, 2011 at 02:26:47PM -0700, Garrett Cooper wrote: > On Mon, Aug 22, 2011 at 1:40 PM, YongHyeon PYUN <pyunyh@gmail.com> wrote: > > On Sun, Aug 21, 2011 at 04:48:56PM -0700, YongHyeon PYUN wrote: > >> On Fri, Aug 19, 2011 at 12:17:12AM -0700, Garrett Cooper wrote: > >> > On Thu, Aug 18, 2011 at 9:31 PM, ?<mdf@freebsd.org> wrote: > >> > > On Thu, Aug 18, 2011 at 5:50 PM, Garrett Cooper <yanegomi@gmail.com> wrote: > >> > >> ? ?When loading if_alc as a module on my netbook and running > >> > >> /etc/rc.d/netif restart, I can deterministically panic my netbook with > >> > >> the following message: > >> > > >> > ? ? These repro steps were overly simplified. The complete steps are: > >> > > >> > 1. Attach ethernet cable to alc(4) enabled NIC. > >> > 2. Boot up machine. > >> > 3. Login. > >> > 4. Physically remove ethernet cable from alc(4) enabled NIC. > >> > 5. Run `/etc/rc.d/netif restart' as root. > >> > > >> > >> I can't reproduce this with AR8151 sample board. Could you give me > >> dmesg output to know exact controller revision? > >> One issue I'm aware of is lack of re-establishing link when > >> controller firmware put its PHY to deep sleep mode. ?The deep sleep > >> mode seems to be automatically activated by firmware when it > >> detects no energy signal(i.e. cable unplugged) so I had to down and > >> up the interface again to take the PHY out of the sleep mode. > >> > > > > Not re-establishing link issue was fixed in r225088. ?I'm not sure > > whether this also fixes kern/148772 though. Because you also seem > > to have the same issue of the PR, it would be good to know whether > > it makes any difference or not. > > The panic no longer occurs with that commit when running > /etc/rc.d/netif restart after inserting and reinserting the ethernet > cable (I've done it several times for good measure); the failing case > was potentially being triggered somehow by the hibernation code path. Hmm, have no idea how this can be related with the panic. :-( BTW, does the commit also fix kern/148772? > Thanks, > -Garrett >
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