8.0 regression: consecutive panics (iwi / wlan / zfs ?)

[martinko]

Jeremy Chadwick wrote:
> On Mon, Jan 04, 2010 at 04:13:36PM +0100, martinko wrote:
>> A few hours ago I experienced 3 consecutive panics on this freshly
>> installed 8.0, the last panic just 28s into boot sequence.  It seems
>> to me that culprit could be iwi/wlan possibly with help from zfs or
>> others.
>> More details even with screen-shot of the last panic follow.
>>
>> I have used versions 5.3 to 6.4 on this laptop, the last one being
>> the most stable and smooth.  A few weeks ago I moved to 8.0 (fresh
>> install) and since then I've been experiencing funny issues.
>>
>> Last night I was writing an email when I noticed my wi-fi link was
>> gone.  I checked /var/log/messages and saw the following:
>>
>> wlan0: link state changed to DOWN
>> wlan0: link state changed to UP
>> wlan0: link state changed to DOWN
>> wlan0: link state changed to UP
>> wlan0: link state changed to DOWN
>> wlan0: link state changed to UP
>> linux: pid 6189 (skype): syscall inotify_init not implemented
>> ZFS NOTICE: Prefetch is disabled by default on i386 -- to enable,
>>              add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
>> ZFS WARNING: Recommended minimum kmem_size is 512MB; expect unstable
>> behavior.
>>               Consider tuning vm.kmem_size and vm.kmem_size_max
>>               in /boot/loader.conf.
>> ZFS filesystem version 13
>> ZFS storage pool version 13
>>
>> While wifi weirdness did not impressed me, I was perplexed by ZFS
>> messages.  I checked kldstat and indeed ZFS was loaded.  Note that I
>> have not attached any ZFS storage devices nor I have ever configured
>> ZFS on this laptop.  And before I could investigate any further my
>> laptop froze and then rebooted.
>
> The ZFS messages in question get printed when ZFS initialises (in your
> case, when the kernel module was loaded).  How or why it got loaded is
> beyond me.
>
> In this case would help to post these kinds of kernel messages taken
> directly from /var/log/messages instead of from dmesg -- the file in
> question is handled by syslog and will have timestamps.
>
> I can't help with the rest of the problems mentioned, sorry.  :-(
>

There's nothing else in log regarding ZFS.  It sure was loaded as I 
checked with kldstat.  But I have not loaded it nor I have ever had any 
device with ZFS on it near this laptop.  Really strange.

This appeared in log shortly before a crash:

Jan  4 04:42:24 mb-aw1n-bsd kernel: wlan0: ieee80211_new_state_locked: 
pending SCAN -> AUTH transition lost
Jan  4 04:42:24 mb-aw1n-bsd kernel: wlan0: link state changed to UP
Jan  4 04:42:24 mb-aw1n-bsd kernel: iwi0: firmware error

And then again on subsequent boot.  Wi-fi did not work and system 
panicked again.  Then panicked already during boot.  A then I switched 
it off which obviously helped (to restore HW to its defaults?).

Hm..

M.