I got this after booting a new GENERIC kernel from
this mornings sup (which looks to be Sunday's sup).

NetBSD/alpha 1.5U FFS Primary Bootstrap
Jumping to entry point...

NetBSD/alpha 1.5U Secondary Bootstrap, Revision 1.11
(kwellsch@pc164sx, Sat Apr 14 19:40:11 EDT 2001)

VMS PAL rev: 0x1000600010115
OSF PAL rev: 0x1000600020117
Switch to OSF PAL code succeeded.

Boot flags: a
5036024+350360 [85+305448+181134]=0x59a120

Entering netbsd at 0xfffffc0000301070...
[ using 487568 bytes of netbsd ELF symbol table ]
consinit: not using prom console
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

panic: uvm_km_init: could not reserve space for kernel
Stopped in pid 0 () at  cpu_Debugger+0x4:       ret     zero,(ra)
db>