Quoting Kostik Belousov <kostik...@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 li...@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
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