Re: port-i386/41934: assertion "(opte & (PG_V | PG_W)) != PG_W" failed

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Aug 24, 2009 at 07:35:00PM +0000, Manuel.Bouyer%lip6.fr@localhost wrote:
> >Number:         41934
> >Category:       port-i386
> >Synopsis:       assertion "(opte & (PG_V | PG_W)) != PG_W" failed
> >Confidential:   no
> >Severity:       critical
> >Priority:       high
> >Responsible:    port-i386-maintainer
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Mon Aug 24 19:35:00 +0000 2009
> >Originator:     Manuel Bouyer
> >Release:        NetBSD 5.0_STABLE
> >Organization:
> >Environment:
> System: NetBSD disco 5.0_STABLE NetBSD 5.0_STABLE (DISCO) #5: Sun Aug 16 
> 00:00:37 MEST 2009 
> bouyer@disco:/home/bouyer/src-5/src/sys/arch/i386/compile/obj/DISCO i386
> Architecture: i386
> Machine: i386
> >Description:
>       This (UP) NFS server paniced with:
> panic: kernel diagnostic assertion "(opte & (PG_V | PG_W)) != PG_W" failed: 
> file "/home/bouyer/src-5/src/sys/arch/x86/x86/pmap.c", line 637
>       I didn't try to get stack trace from ddb, but I do have a core dump.
>       I have seen the same panic on another NFS server on another site,
>       ddb didn't get much info:
> panic: kernel diagnostic assertion "(opte & (PG_V | PG_W)) != PG_W" failed: 
> file "/home/bouyer/src-5/src/sys/arch/x86/x86/pmap.c", line 637
> Begin traceback...
> uvm_fault(0xcef0f008, 0x72753000, 1) -> 0xe
> fatal page fault in supervisor mode
> trap type 6 code 0 eip c03f0311 cs 8 eflags 10246 cr2 72753f70 ilevel 0
> panic: trap
> Faulted in mid-traceback; aborting...
> dumping to dev 18,1 offset 8
> dump i/o error
> 
> 
> >How-To-Repeat:
>       Run NFS with lots of clients ?

Also seen on a general-purpose server (no NFS on this one, so not NFS-related)
with a:
cpu0: Intel (686-class), 3192.10 MHz, id 0xf33
cpu0: features 0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features 0xbfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features 0xbfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 0x41d<SSE3,DTES64,MONITOR,DS-CPL,CID>
cpu0: "Intel(R) Pentium(R) 4 CPU 3.20GHz"
cpu0: I-cache 12K uOp cache 8-way, D-cache 16KB 64B/line 8-way
cpu0: L2 cache 1MB 64B/line 8-way
cpu0: ITLB 4K/4M: 64 entries          
cpu0: DTLB 4K/4M: 64 entries
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: SMT ID 0
cpu0: family 0f model 03 extfamily 00 extmodel 00

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--