kern/39548: kernel debugging assertion "(vp->v_flag & VONWORKLST)" failed

[Simon Burge <simonb%NetBSD.org@localhost>]

>Number:         39548
>Category:       kern
>Synopsis:       kernel debugging assertion "(vp->v_flag & VONWORKLST)" failed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 15 01:30:00 +0000 2008
>Originator:     Simon Burge
>Release:        NetBSD 4.0_STABLE (sources from netbsd-4 branch on Jul 15 2008)
>Organization:
>Environment:
System: NetBSD thoreau 4.0_STABLE NetBSD 4.0_STABLE (THOREAU) #6: Tue Jul 15 
00:48:08 EST 2008 simonb@thoreau:/usr/obj/sys/arch/i386/compile/THOREAU i386
Architecture: i386
Machine: i386
>Description:
        I got a

panic: kernel debugging assertion "(vp->v_flag & VONWORKLST)" failed: file 
"./sys/miscfs/genfs/genfs_vnops.c", line 1283

        panic just after starting to move some large files from one
        filesystem to another.  I was in X at the time, but do have a
        crash dump.  The backtrace is:

#17 0xc045978c in panic (
    fmt=0xc099211c "kernel %sassertion \"%s\" failed: file \"%s\", line %d")
    at ./sys/kern/subr_prf.c:235
#18 0xc075a8a6 in __assert (t=0xc08f1884 "debugging ", 
    f=0xc095eb88 "./sys/miscfs/genfs/genfs_vnops.c", l=1283, 
    e=0xc09053c6 "(vp->v_flag & VONWORKLST)")
    at ../.././sys/lib/libkern/__assert.c:45
#19 0xc0499f6f in genfs_do_putpages (vp=0xd4c3d938, startoff=259100672, 
    endoff=259104768, flags=9, busypg=0x0)
    at ./sys/miscfs/genfs/genfs_vnops.c:1283
#20 0xc0499fe9 in genfs_putpages (v=0xcfe81b60)
    at ./sys/miscfs/genfs/genfs_vnops.c:1055
#21 0xc0496ccc in VOP_PUTPAGES (vp=0xd4c3d938, offlo=0, offhi=0, flags=9)
    at ./sys/kern/vnode_if.c:1592
#22 0xc03f3cc5 in uvn_put (uobj=0xd4c3d938, offlo=259100672, offhi=259104768, 
    flags=9) at ./sys/uvm/uvm_vnode.c:273
#23 0xc03ef9b3 in uvm_pageout (arg=0xcf418c1c) at ./sys/uvm/uvm_pdaemon.c:732
#24 0xc01002e1 in proc_trampoline ()

        The eariler frames are for a secondary "panic: wdc_exec_command:
        polled command not done" panic that happened after the dump (and
        then it proceeded to dump again!).

        This is with a UP kernel on a machine with 2GB of RAM, a mix of
        raidframe and standalone disks (swap is to a RF mirror).  The
        kernel has DIAGNOSTIC, LOCKDEBUG, DEBUG.

>How-To-Repeat:
        Not sure - only observed once so far.

>Fix:
        None given.