port-alpha: 1.6 panic from uvm

Subject: 1.6 panic from uvm_bio.c
To: None <port-alpha@netbsd.org>
From: Stephen M. Jones <smj@cirr.com>
List: port-alpha
Date: 11/14/2002 17:26:25

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?