Process locked up in state mclpl

[Stuart Brooks <stuartb%cat.co.za@localhost>]

I've just had a number of processes lock up in state=mclpl on NetBSD 
3.1_STABLE. There is a substantial amount of UDP and TCP traffic between 
processes on the machine. I was wondering if this is likely to be 
PR35224 (http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=35224), 
and if so whether anyone has updated status on it? The last comment in 
this PR was from Dec 2006.

Thanks
Stuart

My top:

load averages:  0.23,  0.23,  0.21    09:53:58
110 processes: 109 sleeping, 1 on processor

Memory: 513M Act, 256M Inact, 1336K Wired, 75M Exec, 557M File, 2776K Free
Swap: 600M Total, 600M Free


 PID USERNAME PRI NICE   SIZE   RES STATE      TIME   WCPU    CPU COMMAND
 463 root       2    0  6132K   14M select     0:06  0.05%  0.05% kdeinit
2472 postgres -22   -2  4580K    4K mclpl    814:23  0.00%  0.00% 
<postgres>
2631 root     -22    0   644K    4K mclpl    606:25  0.00%  0.00% 
<test_writer
1622 root       2    0  8456K   14M select    19:05  0.00%  0.00% kdeinit
1952 postgres   2   -2  3544K    4K netlck    13:52  0.00%  0.00% 
<postgres>
 233 root       2    0    24M   31M select     4:47  0.00%  0.00% XFree86
 451 root       2    0  3544K   15M select     4:45  0.00%  0.00% kdeinit
  16 root      18    0     0K  182M syncer     3:51  0.00%  0.00% [ioflush]
  17 root     -18    0     0K  182M aiodoned   1:46  0.00%  0.00% 
[aiodoned]
  15 root     -18    0     0K  182M pgdaemon   1:30  0.00%  0.00% 
[pagedaemon]
1301 root     -22    0  4092K    4K mclpl      1:23  0.00%  0.00% <kdeinit>
2680 postgres   2   -2  3560K 1588K poll       1:18  0.00%  0.00% postgres
1493 root       2    0  3488K   17M select     1:09  0.00%  0.00% korgac
 461 root       2    0  3748K   16M select     0:57  0.00%  0.00% kdeinit
3156 postgres   2   -2  3448K 1792K select     0:45  0.00%  0.00% postgres
1174 root       2    0  2608K 2928K select     0:40  0.00%  0.00% profiler
1428 root       2    0  3376K   13M select     0:26  0.00%  0.00% kdeinit
2661 postgres -22   -2  4896K    4K mclpl      0:11  0.00%  0.00% 
<postgres>


A ps on postgres:

database> ps -ax | grep post
1952 ?      IW<s  13:52.24 postgres: writer process
2113 ?      S<s    0:03.04 postgres: logger process
2157 ?      S<s    0:03.12 postgres: autovacuum launcher process
2199 ?      I<s    0:00.04 postgres: metauser metadb [local] SELECT
2472 ?      DW<s 814:23.50 postgres: metauser metadb localhost(65524) COMMIT
2661 ?      DW<s   0:11.27 postgres: metauser metadb localhost(65525) idle
2680 ?      S<s    1:18.75 postgres: stats collector process
3156 ?      S<s    0:45.12 postgres: wal writer process
24362 ?      IW<s   0:00.00 postgres: autovacuum worker process
25024 ?      IW<s   0:00.00 postgres: autovacuum worker process
25134 ?      IW<s   0:00.00 postgres: autovacuum worker process
3289 ttyp5  I<     0:01.96 /usr/local/pgsql/bin/postgres -D ../data/metadb