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Date: Tue, 18 Oct 2005 12:00:26 GMT
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To: freebsd-bugs@FreeBSD.org
From: Chris Dionissopoulos <dionch@freemail.gr>
Cc: 
Subject: Re: misc/87421: KERNEL PANIC: ng_ether +ng_eiface + if_bridge
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The following reply was made to PR kern/87421; it has been noted by GNATS.

From: Chris Dionissopoulos <dionch@freemail.gr>
To: Gleb Smirnoff <glebius@FreeBSD.org>
Cc: thompsa@FreeBSD.org, freebsd-gnats-submit@FreeBSD.org
Subject: Re: misc/87421: KERNEL PANIC: ng_ether +ng_eiface + if_bridge
Date: Tue, 18 Oct 2005 14:57:22 +0300

 Gleb Smirnoff wrote:
 
 >  Chris,
 >
 >  a few questions:
 >
 >On Fri, Oct 14, 2005 at 05:29:26AM +0000, Chris Dionissopoulos wrote:
 >C> FreeBSD mail.local 6.0-BETA5 FreeBSD 6.0-BETA5 #4: Fri Sep 30 19:10:42 EEST 2005     root@mail.local:/usr/obj/usr/src/sys/MAIL  i386
 >C> >Description:
 >C>               I get a kernel panic when i'm using if_bridge bridge0 interface with 2 virtuals (ng_eiface) and one physical (xl0). 
 >C> The panic message is:
 >C> sbflush_locked: cc 0 || mb 0xc1aa2400 || mbcnt 512
 >
 >Can you please obtain a backtrace, like desribed here:
 >
 >  http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-gdb.html
 >  
 >
 I 'll try to reproduce/trace vmcore as soon as possible.
 (Now I'm using ng_bridge in this box[6-RC1 today], seems stable enough)
 
 >It looks like your ngeth interfaces aren't connected to any graph. Is that
 >true?
 >  
 >
 yes. ng_ether interfaces defined for application usage* only.
 (* to make pf able to distinguish  traffic based on mac-addr, for multi 
 path routing purposes)
 
 >Is it essential that ng_ether node is loaded? You don't use it in your
 >example.
 >  
 >
 yes.I need to enable/disable  "setautosrc" option on demand which only 
 ng_ether(4) provides.
 
 >Actually, a bug in interoperation between ng_ether and if_bridge has been
 >fixed in CURRENT. It is not yet merged to RELENG_6. However, your panic
 >looks different. That's why I am asking about backtrace.
 >
 >  
 >
 IIRC i had (same?) panics a year ago using  
 ng_eiface+ng_ether+{ng_bridge|ng_onemany} in a 
 releng_5  (the same box). Keep in mind that when i 'm creating/altering 
 netgraph nodes at the same time
 i have ~500 connections and some daemons running (samba,isc-dhcp on  
 physical, apache,mysql).
 
  
 Thanks,
 
 Chris.
 
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