Kris Kennaway schrieb:
The machine has 4gb of ram, a 4gb swap partition on /dev/amrd0s1b, and
provides nfs/nis/samba/printing (cups) services.
I have the same problem with FreeBSD 6.1-RELEASE on my SMP-System
(2xAthlon MP) with an asr-RAID (Adaptec 2110S).
The disks are OK (complete read with 'dd if=/dev/da...' showed no errors).
The deadlocks often occured during backups, so I suspect a race
condition or too many interrupts to be the cause.
You could try increasing the timeout in the msleep() in
vm/swap_pager.c. If your system is just so heavily loaded that the
I/O command really is taking more than 20 seconds to complete, you may
be getting false positives.
I set my timeout to 40 secs, without deadlocks since then.
But instead I got two Crashes with Trap 12: page fault.
lock order reversal: sleepable after non-sleepable
1st 0x... unp@/usr/src/sys/kern/uipc_usrreq.c:981
2nd 0x... usermap@/usr/src/sys/vm/vm_map.c:2997
Any suggestions are welcome.
--
Martin Schütte
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