On 3/26/02 9:48 AM, "der Mouse" <mouse@Rodents.Montreal.QC.CA> wrote:

> I'm working with a company using a proprietary PowerPC port, and
> they're having trouble.  Most of it is neither here nor there as far as
> NetBSD at large is concerned.  But last night, I found something that
> looks to me like a real bug.
> 
> I got this output while rebooting, with a LOCKDEBUG kernel:
> 
> /dev/rwd0a: 1137 files, 460468 used, 1174888 free (320 frags, 146821 blocks,
> 0.0% fragmentation)
> /dev/rwd0a: MARKING FILE SYSTEM CLEAN
> [0x3852008:10] simple_lock: lock held
> [0x3852008:10] lock: 0x1750e0, currently at: ../../../../uvm/uvm_km.c:364
> [0x3852008:10] last locked: ../../../../uvm/uvm_vnode.c:493 [65412289]
> [0x3852008:10] last unlocked: ../../../../uvm/uvm_vnode.c:755 [65346014]
> [0x3852008:10] simple_unlock: lock not held
> [0x3852008:10] lock: 0x1750e0, currently at: ../../../../uvm/uvm_vnode.c:755
> [0x3852008:10] last locked: ../../../../uvm/uvm_km.c:364 [65412473]
> [0x3852008:10] last unlocked: ../../../../uvm/uvm_km.c:366 [65412478]
> Check /dev/wd0e
> /dev/rwd0e: 21 files, 619 used, 200052 free (52 frags, 25000 blocks, 0.0%
> fragmentation)
> /dev/rwd0e: MARKING FILE SYSTEM CLEAN
>
> Is this a real bug?  It sure looks like it to me: either uvm's paradigm
> for pageq locking is broken or the pmap in question is misusing a uvm
> interface.  The pmap.c in question is arch/powerpc/powerpc/pmap.c
> version 1.44; the UVM file versions in question are
> 
> /*    $NetBSD: uvm_km.c,v 1.49 2001/06/02 18:09:26 chs Exp $    */
> /*    $NetBSD: uvm_map.c,v 1.99 2001/06/02 18:09:26 chs Exp $    */
> /*    $NetBSD: uvm_map_i.h,v 1.21 2001/06/02 18:09:27 chs Exp $    */
> /*    $NetBSD: uvm_vnode.c,v 1.50 2001/05/26 21:27:21 chs Exp $    */
> 
> Would this go away with NEW_PMAP, maybe?  Worth a PR?

Yes it goes away with NEWPMAP.  I assume this is 1.5?  (NEWPMAP can run
On 1.5 since that's what I mostly use it on).
-- 
Matt Thomas                     email: matt@3am-software.com
3am Software Foundry              www: http://3am-software.com/bio/matt/
Cupertino, CA              disclaimer: I avow all knowledge of this message.