port-xen/44734: Starting atalkd triggers assertion panic with i386 xen domU

[netbsd%precedence.co.uk@localhost]

>Number:         44734
>Category:       port-xen
>Synopsis:       Starting atalkd triggers assertion panic with i386 xen domU 
>"off < percpu_nextoff"
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 17 11:10:00 +0000 2011
>Originator:     Stephen Borrill
>Release:        NetBSD 5.1_STABLE
>Organization:
        
>Environment:
        
        
System: NetBSD newbuild 5.1_STABLE NetBSD 5.1_STABLE (NETMANXEN3) #1: NetBSD 
5.1_STABLE (NETMANXEN3) #7: Thu Feb 17 10:17:29 GMT 2011
        
root%builder.internal.precedence.co.uk@localhost:/usr/work/netmanager/work/obj/5.0/sys/arch/i386/compile/NETMANXEN3
 i386
Architecture: i386
Machine: i386
>Description:
Starting atalkd.
panic: kernel diagnostic assertion "off < percpu_nextoff" failed: file 
"/usr/src/5.0/sys/kern/subr_percpu.c", line 78
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c03a93ec cs 9 eflags 246 cr2 bb781210 ilevel 6
Stopped in pid 0.5 (system) at  netbsd:breakpoint+0x4:  popl    %ebp
db> bt
breakpoint(c045d0c7,cc579bf8,c0472b40,3,c1055a00,c1055d00,0,0,0,0) at 
netbsd:breakpoint+0x4
panic(c0466f24,c042c511,c04511e9,c045121c,4e,ccff9000,cc579c2c,c0309a36,c042c511,c045121c)
 at netbsd:panic+0x1a6
__kernassert(c042c511,c045121c,4e,c04511e9,0,ccff9000,cc579c3c,c0309a5a,0,c0469800)
 at netbsd:__kernassert+0x39
percpu_offset(0,c0469800,cc579c4c,c0309a95,0,c0472b40,cc579c7c,c0334923,0,1) at 
netbsd:percpu_offset+0x46
percpu_getptr_remote(0,c0472b40,cc579c7c,c0334923,0,1,2,c03bf3c7,c1190600,c04ac580)
 at netbsd:percpu_getptr_remote+0x1a
percpu_getref(0,1,2,c03bf3c7,c1190600,c04ac580,0,c1190600,c1055c00,0) at 
netbsd:percpu_getref+0x25
m_claim(c1055c00,c0469800,c0110c90,ccffd004,c04ac582,1,cc579cbc,c02e1387,c04ac582,cc579cfc)
 at netbsd:m_claim+0x53
aarpprobe(ccffd004,ca3117c0,cc579cfc,c03bf47a,c0472b88,c04ac5e0,c04acde8,c04ad5e8,c04adde8,c0110c90)
 at netbsd:aarpprobe+0xb1
callout_softclock(0,cc579d28,c02dd6ac,ca307500,0,cc579da0,0,cc51e074,c02f0750,ca307500)
 at netbsd:callout_softclock+0x1a2
softint_thread(cc51e074,0,c010006b,c0100063,c010006b,0,0,0,0,0) at 
netbsd:softint_thread+0x93

Doesn't seem to affect 'real' i386, just i386 PV domU

Kernel configuration is:
include         "arch/i386/conf/XEN3PAE_DOMU"

options         MBUFTRACE
options         GATEWAY
options         MROUTING
options         APPLETALK
options         NMBCLUSTERS=16384

no options      COMPAT_NOMID
no options      COMPAT_09
no options      COMPAT_10
no options      COMPAT_11
no options      COMPAT_12
no options      COMPAT_13
no options      COMPAT_14
no options      COMPAT_15
no options      COMPAT_43

options         ALTQ
options         ALTQ_CBQ
options         ALTQ_RED

pseudo-device   carp
no pseudo-device        sl
no pseudo-device        stf
options         BRIDGE_IPF

options         IPSTATE_SIZE=30011
options         IPSTATE_MAX=21011

>How-To-Repeat:
Install pkgsrc/net/netatalk on an i386 Xen domU
/etc/rc.d/atalkd onestart
>Fix:
        

>Unformatted: