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kern/38153: panic: uvm_map_pageable: stale map

>Number:         38153
>Category:       kern
>Synopsis:       uvm panic when initialising ntpd
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 04 03:40:00 +0000 2008
>Release:        NetBSD 4.99.55
System: NetBSD spike.internal 4.99.55 NetBSD 4.99.55 (XEN3_DOMU) #1: Mon Mar 3 
20:14:28 EST 2008 
root%spike.internal@localhost:/usr/obj/sys/arch/i386/compile/XEN3_DOMU i386
Architecture: i386
Machine: i386
When starting ntpd on certain i386 domus, the kernel panics with:

Stopped in pid 664.1 (ntpd) at  netbsd:breakpoint+0x4:  popl    %ebp
db> bt
breakpoint(c04332af,cc8acb18,c0448dc0,c028cc5e,cc66e944) at 
panic(c041e9b3,bb96f000,bb989000,7,1) at netbsd:panic+0x1bf
uvm_map_pageable(cc66e934,bb96f000,bb989000,0,1) at 
uvm_mmap(cc66e934,cc8accc8,1a000,5,7) at netbsd:uvm_mmap+0x50d
sys_mmap(cc758840,cc8acd00,cc8acd28,c039a7d5,c038fb46) at 
syscall(cc8acd48,1f,1f,bfbf001f,bba6001f) at netbsd:syscall+0xb8

The configuration is stock standard with the only difference between
a working domu and one that fails being the load and processes running.

load averages:  0.02,  0.02,  0.00                  up 0 days,  3:01   14:30:37
32 processes:  29 sleeping, 2 stopped, 1 on CPU
CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
Memory: 298M Act, 6604K Wired, 12M Exec, 256M File, 166M Free
Swap: 512M Total, 512M Free

Coincidentally, this problem is only occuring on domus that have a database,
one is running postgresql/ldap and the other is running zope.

Not entirely sure. Nobody else appears to have this problem whereas I have 
it in two seperate instances.

Maybe running postgresql, samba, ldap and starting ntpd?



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