there's not enough information here to know what the problem is.
this isn't a known one.

do you have a crash dump from this?
or even just a stack trace?

-Chuck


On Thu, Nov 14, 2002 at 05:26:25PM -0600, Stephen M. Jones wrote:
> I was seeing this with the 1.6 distribution and grabbed the 'stable' 1.6
> code released on Nov 9th and am still seeing this panic.
> 
> panic: kernel diagnostic assertion "umap->refcount != 0" failed: file "/osys/arch/alpha/compile/NORGE/../../../../uvm/uvm_bio.c", line 253
> panic: kernel diagnostic assertion "umap->refcount != 0" failed: file "/var/src/src/sys/arch/alpha/compile/ICELAND/../../../../uvm/uvm_bio.c", line 253
> 
>         umap = &ubc_object.umap[ubc_offset >> ubc_winshift];
>         KASSERT(umap->refcount != 0);
>         slot_offset = ubc_offset & (ubc_winsize - 1);
> 
> Is there a patch for this in current?