Arla lockup

[Michael Sperber [Mr. Preprocessor]]

I get lockups on heavy load.  The system won't accept keyboard input,
and the network goes dead.  Here's the last thing it said:

Sep 23 10:29:05 reunion /kernel: xfs_lookup: (cat1/cdrecord.1.gz, 4), nameiop = 
0, flags = 16580
Sep 23 10:29:05 reunion /kernel: xfs_access mode = 0100
Sep 23 10:29:12 reunion /kernel: xfs_access(0100) = 0
Sep 23 10:29:14 reunion /kernel: xfs_dnlc_lookup(0xc4550e40, "cat1/cdrecord.1.gz
")
Sep 23 10:29:14 reunion /kernel: xfs_dnlc_lookup: v_id = 52682
Sep 23 10:29:14 reunion /kernel: xfs_dnlc_lookup: calling cache_lookup:dvp = 0xc
4550e40, cnp = (cat1/cdrecord.1.gz, 4, 361), flags = 40c4
Sep 23 10:29:14 reunion /kernel: xfs_dnlc_lookup: cache_lookup returned. error =
 0, *res = 0
Sep 23 10:29:14 reunion /kernel: xfs_message_rpc opcode = 4
Sep 23 10:29:14 reunion /kernel: xfs_syscall(2k: 0xc451acc0, 1152
Sep 23 10:29:14 reunion /kernel: xfs_access mode = 0100
Sep 23 10:29:14 reunion /kernel: xfs_access(0100) = 0
Sep 23 10:29:15 reunion /kernel: xfs_lock: 0xc45ad0c0, 135
Sep 23 10:29:15 reunion /kernel: xfs_unlock: 0xc451acc0, 1153
Sep 23 10:29:15 reunion /kernel: xfs_readlink
Sep 23 10:29:15 reunion /kernel: xfs_lock: 0xc451acc0, 1153
Sep 23 10:29:15 reunion /kernel: xfs_access mode = 0100
Sep 23 10:29:15 reunion /kernel: xfs_access(0100) = 0
Sep 23 10:29:15 reunion /kernel: xfs_lock: 0xc451b500, 1279
Sep 23 10:29:15 reunion /kernel: xfs_unlock: 0xc451acc0, 1154
Sep 23 10:29:15 reunion /kernel: xfs_access mode = 0100
Sep 23 10:29:15 reunion /kernel: xfs_access(0100) = 0

This is 0.27 (+ SIGALRM patch) on FreeBSD 3.2-RELEASE.

It's quite reproducible.  How do I start debugging this?

-- 
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla