freebsd stable - Mar 2006 - panic with ZERO_COPY_SOCKETS on 5.4 (and probably 6.0)

Hello freebsd-stable,

  I've seen several panics on a 5.4-STABLE (RELENG_5 at end of January)
  under moderate ftpd/samba load with diagnostic:

    vm_page_free: freeing wired page

  Server rebooted after a panic every ~4 hours. Removing
  ZERO_COPY_SOCKETS from kernel config resolved problem.
  And I've found same diagnostic with same causes in freebsd-current@
  mail lists on a 6.0-RC1:
 
http://www.freebsd.org/cgi/getmsg.cgi?fetch=330124+334658+/usr/local/www/db/text/2005/freebsd-current/20051023.freebsd-current

  Also, there is a PR with a similar diagnostic (but not sure if it is
  ZERO_COPY_SOCKETS problem):
  http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/75780

  I still have coredumps on my machine together with copy of
  kernel.debug (although I've updated machine to 5.5-PRERELEASE alredy),
  and can provide backtrace etc. if somebody will be interested in this.

-- 
Best regards,
 Vadim Goncharov   ICQ UIN 166852181   mailto:vadim_nuclight@mail.ru

On Wed, Mar 15, 2006 at 06:37:31PM +0600, Vadim Goncharov
wrote:
> Hello freebsd-stable,
> 
>   I've seen several panics on a 5.4-STABLE (RELENG_5 at end of January)
>   under moderate ftpd/samba load with diagnostic:
> 
>     vm_page_free: freeing wired page
> 
>   Server rebooted after a panic every ~4 hours. Removing
>   ZERO_COPY_SOCKETS from kernel config resolved problem.
>   And I've found same diagnostic with same causes in freebsd-current@
>   mail lists on a 6.0-RC1:
>  
http://www.freebsd.org/cgi/getmsg.cgi?fetch=330124+334658+/usr/local/www/db/text/2005/freebsd-current/20051023.freebsd-current
> 
>   Also, there is a PR with a similar diagnostic (but not sure if it is
>   ZERO_COPY_SOCKETS problem):
>   http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/75780
> 
>   I still have coredumps on my machine together with copy of
>   kernel.debug (although I've updated machine to 5.5-PRERELEASE
alredy),
>   and can provide backtrace etc. if somebody will be interested in this.
There were fixes for this after 6.0.  I don't know if anyone is
interested in merging the fixes to 5.5; you should update to 6.1 for
this and many other reasons.

Kris
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