On Fri, Mar 02, 2007 at 09:56:04PM -0800, Hisashi T Fujinaka wrote:
> What definitely kills things is a "cvs up" of src or pkgsrc while
> running "pkg_chk -u". Things slow way down and top shows 100% idle.

Yeah, I had a hang in the middle of a big pkg_delete -r and was also
using pkg_chk at the same time. So I had to reset and this left
the pkg database in a bad stage => I rebuilding /usr/pkg now.

Here is a ident diff between two kernels:
-     $NetBSD: GENERIC,v 1.809 2007/02/18 18:05:52 dsl Exp $
-     $Revision: 1.809 $
+     $NetBSD: GENERIC,v 1.810 2007/03/01 14:57:38 kiyohara Exp $
+     $Revision: 1.810 $

+     $NetBSD: kern_drvctl.c,v 1.9 2006/11/01 10:17:58 yamt Exp $

-     $NetBSD: auconv.c,v 1.19 2006/11/16 01:32:44 christos Exp $
-     $NetBSD: audio.c,v 1.218 2007/02/21 22:59:58 thorpej Exp $
+     $NetBSD: auconv.c,v 1.20 2007/03/01 17:31:35 thorpej Exp $
+     $NetBSD: audio.c,v 1.219 2007/03/01 17:31:35 thorpej Exp $

-     $NetBSD: kern_mutex.c,v 1.6 2007/02/26 19:11:28 ad Exp $
+     $NetBSD: kern_mutex.c,v 1.7 2007/03/02 13:14:12 itohy Exp $

-     $NetBSD: subr_disk.c,v 1.83 2006/11/25 11:59:58 scw Exp $
+     $NetBSD: subr_disk.c,v 1.84 2007/03/01 21:30:50 martin Exp $

-     $NetBSD: subr_kmem.c,v 1.13 2007/02/09 21:55:31 ad Exp $
+     $NetBSD: subr_kmem.c,v 1.14 2007/03/02 12:30:53 yamt Exp $

-     $NetBSD: sys_lwp.c,v 1.7 2007/02/26 09:20:54 yamt Exp $
+     $NetBSD: sys_lwp.c,v 1.11 2007/03/02 21:06:27 ad Exp $

-     $NetBSD: vfs_syscalls.c,v 1.303 2007/02/28 20:39:06 pooka Exp $
+     $NetBSD: vfs_syscalls.c,v 1.304 2007/03/01 10:02:31 pooka Exp $

-     $NetBSD: x86_machdep.c,v 1.7 2007/02/21 22:59:55 thorpej Exp $
+     $NetBSD: x86_machdep.c,v 1.8 2007/03/01 11:49:26 yamt Exp $

-     $NetBSD: pmap.c,v 1.198 2007/02/21 22:59:44 thorpej Exp $
+     $NetBSD: pmap.c,v 1.199 2007/03/02 17:10:58 ad Exp $

-     $NetBSD: st.c,v 1.194 2006/11/16 01:33:26 christos Exp $
+     $NetBSD: st.c,v 1.195 2007/03/01 17:31:36 thorpej Exp $

+     $NetBSD: btuart.c,v 1.1 2007/02/20 16:53:20 kiyohara Exp $

This was nearly the same kernel config, except that I added the
pseudo-device drvctl and the GENERIC change for btuart.

Bernd