double fault when using fssconfig + repetitive savecore problem

[theo borm <theo_nbusr%borm.org@localhost>]

Hi,

After upgrading (actually a new install) to NetBSD 5.1 I find myself 
unable to use filesystem snapshots.
"fssconfig -c -x fss0 / /tmp/backingstore" reliably results in lots of 
green text on the console and attached (first part) log entries.

Assuming that regressions don't occur, I must be doing something wrong, 
question remains: what?

Assuming this is an unfortunate regression from 4.*, I guess it would be 
nice to have a core dump for debugging....
Unfortunately, I now get a savecore on EVERY reboot, even after a 
gracious shutdown (as shown in part 2, I now have 5 core dumps)

How do I stop this save-core-ing?


The only modification (IIRC) with respect to the generic kernel is 
commenting out of the re* driver. I need to do this because otherwise 
networking is unusable on this system (re0: watchdog timeout)

regards, theo


----- part 1 -----
Feb 11 11:42:58 secpot-r /netbsd: uvm_fault(0xffffffff80c7b1c0, 
0xffff80001e495000, 1) -> e
Feb 11 11:42:58 secpot-r /netbsd: fatal page fault in supervisor mode
Feb 11 11:42:58 secpot-r /netbsd: trap type 6 code 0 rip 
ffffffff803b8ebe cs 8 rflags 10206 cr2  ffff80001e495000 cpl 0 rsp 
ffff80004cda0160
Feb 11 11:42:58 secpot-r /netbsd: panic: trap
Feb 11 11:42:58 secpot-r /netbsd: Begin traceback...
Feb 11 11:42:58 secpot-r /netbsd: uvm_fault(0xffff80004cd75e80, 0x0, 1) -> e
Feb 11 11:42:58 secpot-r /netbsd: fatal page fault in supervisor mode
Feb 11 11:42:58 secpot-r /netbsd: trap type 6 code 0 rip 
ffffffff8052711c cs 8 rflags 10246 cr2  0 cpl 0 rsp ffff80004cd9fd00
Feb 11 11:42:58 secpot-r /netbsd: panic: trap
Feb 11 11:42:58 secpot-r /netbsd: Faulted in mid-traceback; aborting...
Feb 11 11:42:58 secpot-r /netbsd: dumping to dev 0,1 offset 1632
Feb 11 11:42:58 secpot-r /netbsd: dump 3071 <SNIP> 2870
Feb 11 11:42:58 secpot-r /netbsd:
Feb 11 11:42:58 secpot-r /netbsd:
Feb 11 11:42:58 secpot-r /netbsd: rebooting...


----- part 2 -----
Feb 11 11:42:58 secpot-r savecore: warning: (null) version mismatch:     
NetBSD 5.1 (GENERIC_no_re) #0: Thu Dec  9 11:11:36 CET 2010     
root@:/usr/src/sys/arch/amd64/compile/GENERIC_no_re  and     
Feb 11 11:42:58 secpot-r savecore: reboot after panic: panic: trap
Feb 11 11:42:58 secpot-r savecore: writing compressed core to 
/var/crash/netbsd.3.core.gz
Feb 11 11:44:39 secpot-r savecore: writing compressed kernel to 
/var/crash/netbsd.3.gz
Feb 11 11:44:39 secpot-r savecore: (null): Bad address
<SNIP>
Feb 11 12:46:57 secpot-r savecore: warning: (null) version mismatch:     
NetBSD 5.1 (GENERIC_no_re) #0: Thu Dec  9 11:11:36 CET 2010     
root@:/usr/src/sys/arch/amd64/compile/GENERIC_no_re  and     
Feb 11 12:46:57 secpot-r savecore: reboot after panic: panic: trap
Feb 11 12:46:57 secpot-r savecore: writing compressed core to 
/var/crash/netbsd.5.core.gz
Feb 11 12:49:27 secpot-r savecore: writing compressed kernel to 
/var/crash/netbsd.5.gz
Feb 11 12:49:27 secpot-r savecore: (null): Bad address