Re: panic: bundirty: buffer 0xc776e118 still on queue 2

On Thu, Aug 21, 2003 at 08:14:45AM +0200, Christian Brueffer wrote:

> On Thu, Aug 21, 2003 at 01:40:54PM +1000, Tim Robbins wrote:
> > 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.
> > 
> 
> No, all mounts were read-write.

Did one of the servers go down shortly before the panic, then? The last few
lines of dmesg might be useful.


Tim