port-amd64/37742: Occasional 'panic: out of KVA space' shortly after booting amd64 -current

[jmcneill%invisible.ca@localhost]

>Number:         37742
>Category:       port-amd64
>Synopsis:       Occasional 'panic: out of KVA space' shortly after booting 
>amd64 -current
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 11 02:05:00 +0000 2008
>Originator:     Jared D. McNeill
>Release:        NetBSD 4.99.48
>Organization:
        
>Environment:
        
        
System: NetBSD black.invisible.ca 4.99.48 NetBSD 4.99.48 (GENERIC) #71: Tue Jan 
8 19:29:09 EST 2008 
jmcneill%black.invisible.ca@localhost:/export/home/jmcneill/branches/HEAD/src/sys/arch/amd64/compile/GENERIC
 amd64
Architecture: x86_64
Machine: amd64
>Description:
        Occasionally during boot, my laptop panics with 'out of KVA space'.
        It seems to coincide with gdm starting from rc.d, but with gdm
        disabled I have still seen this panic before the login: prompt
        is displayed.
>How-To-Repeat:
        Unfortunately, I can not reliably reproduce it. Rebooting with the
        same kernel 10 times after will not show the issue, for example.
>Fix:
        

>Unformatted: