panic: bundirty: buffer 0xc776e118 still on queue 2

[Tim Robbins]

On Thu, Aug 21, 2003 at 12:26:07AM +0200, Christian Brueffer wrote:

> Hi,
> 
> just got a panic on following 5.1-CURRENT machine:
> 
> FreeBSD gondor.middleearth 5.1-CURRENT FreeBSD 5.1-CURRENT #1: Thu Aug
> 7 21:32:39 CEST 2003     chris at haa konia.hitnet.rwth-aachen.de:/usr/obj/usr/src/sys/GONDOR  i386
> 
> A dump is available if anyone needs specific information.
[...]
> panic: bundirty: buffer 0xc776e118 still on queue 2^M
[...]
> #2  0xc0254007 in panic (fmt=0xc03cc0ef "bundirty: buffer %p still on queue %d")^M
>      at /usr/src/sys/kern/kern_shutdown.c:550^M
> #3  0xc029b291 in bundirty (bp=0xc776e118) at /usr/src/sys/kern/vfs_bio.c:1121^M
> #4  0xc029bde1 in brelse (bp=0xc776e118) at /usr/src/sys/kern/vfs_bio.c:1436^M
> #5  0xc02efcb8 in nfs_writebp (bp=0xc776e118, force=1, td=0xc2c17e40)^M
>          at /usr/src/sys/nfsclient/nfs_vnops.c:2987^M
> #6  0xc02e02c3 in nfs_bwrite (bp=0x0) at /usr/src/sys/nfsclient/nfs_bio.c:76^M
> #7  0xc029dd41 in getblk (vp=0xc2c77b68, blkno=400, size=15360, slpflag=256, slptimeo=0, flags=0)^M
> 	     at /usr/src/sys/kern/vfs_bio.c:2512^M
> #8  0xc02e21e5 in nfs_getcacheblk (vp=0xc2c77b68, bn=400, size=15360, td=0xc2c17e40)^M
> 	         at /usr/src/sys/nfsclient/nfs_bio.c:1037^M

I think I recognise this backtrace. Did you have a read-only NFS mount
active at the time of the crash? In any case, a copy of your NFS entries from
/etc/fstab (with any private data removed) would be helpful in tracking this
problem down.


Tim