Panic with chromium and 8.1-STABLE (Thu Sep 16 09:52:17 BRT 2010)

[Mario Sergio Fujikawa Ferreira]

Quoting Kostik Belousov <kostikbel at gmail.com>:

> On Sun, Sep 19, 2010 at 07:28:13PM -0300, Mario Sergio Fujikawa  
> Ferreira wrote:
>> Hi,
>>
>> 	I've just began trying chrome web browser from
>> http://chromium.hybridsource.org/ but it triggered 2 panics on my
>> 8.1-STABLE system.
>>
>> $ uname -a
>> FreeBSD exxodus.fedaykin.here 8.1-STABLE FreeBSD 8.1-STABLE #26:  
>> Thu Sep 16 09:52:17 BRT 2010      
>> lioux at exxodus:/usr/obj/usr/src/sys/LIOUX  amd64
>>
>> 	The panic information is:
>>
>> ------------
>> panic: vm_page_unwire: invalid wire count: 0
>> cpuid = 0
>> KDB: enter: panic
>>
>> 0xffffff006ecce000: tag ufs, type VREG
>>     usecount 1, writecount 1, refcount 4 mountedhere 0
>>     flags ()
>>     v_object 0xffffff0151489870 ref 0 pages 8
>>     lock type ufs: EXCL by thread 0xffffff00200947c0 (pid 25025)
>>         ino 119526591, on dev ufs/fsusr
>>
>> 0xffffff011107f938: tag ufs, type VREG
>>     usecount 0, writecount 0, refcount 4 mountedhere 0
>>     flags (VV_NOSYNC|VI_DOINGINACT)
>>     v_object 0xffffff0151f7f870 ref 0 pages 1284
>>     lock type ufs: EXCL by thread 0xffffff01882cc7c0 (pid 26689)
>>         ino 263, on dev md0
>> ------------
>>
>> 	I've made available 2 ddb textdumps at:
>>
>> http://people.freebsd.org/~lioux/panic/2010091900/textdump.tar.0
>> http://people.freebsd.org/~lioux/panic/2010091900/textdump.tar.1
>>
>> 	I was able to use chrome prior to this latest kernel update.
>> Now, I can reproduce a kernel panic even browsing www.google.com
>>
>> 	Please, let me know if I can provide any further information.
>
> Does it panic if you remove ZERO_COPY_SOCKETS option from the kernel
> config ?
>

   Right on the spot. Removing ZERO_COPY_SOCKETS stopped the panics.  
The panics restart if I add them again.

   Regards,

-- 
Mario S F Ferreira - DF - Brazil - "I guess this is a signature."
feature, n: a documented bug | bug, n: an undocumented feature