port-alpha/38608: uvm_fault_internal

[dmcmahill%NetBSD.org@localhost]

>Number:         38608
>Category:       port-alpha
>Synopsis:       kernel crash, uvm_fault_internal
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-alpha-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 07 18:45:00 +0000 2008
>Originator:     Dan McMahill
>Release:        NetBSD 4.0_STABLE
>Organization:
NetBSD
>Environment:
        
        
System: NetBSD bondage 4.0_STABLE NetBSD 4.0_STABLE (GENERIC) #0: Fri Apr 4 
08:23:40 EST 2008 
dan@bondage:/export/disk2/netbsd-4/obj/alpha/sys/arch/alpha/compile/GENERIC 
alpha
Architecture: alpha
Machine: alpha
>Description:

I've been trying to build a whole bunch of packages on my alpha.  After
several days of compiling I've now twice had the machine panic.

db> bt
cpu_Debugger() at netbsd:cpu_Debugger+0x4
panic() at netbsd:panic+0x1e8
trap() at netbsd:trap+0x378
XentMM() at netbsd:XentMM+0x20
--- memory management fault (from ipl 0) ---
pmap_physpage_addref() at netbsd:pmap_physpage_addref+0x7c
pmap_enter() at netbsd:pmap_enter+0x454
uvm_fault_internal() at netbsd:uvm_fault_internal+0xd00
trap() at netbsd:trap+0x5ec
XentMM() at netbsd:XentMM+0x20
--- memory management fault ---
--- user mode ---


The machine has 512 Mb of physical RAM and the same of swap.
Could it be that I just don't have enough swap space?  Even so, 
its not good that I get a panic.

        
>How-To-Repeat:

set up a bulk build, let it run for a long time.
        
>Fix:
no idea.
        

>Unformatted: