DFly-stable as of April 1st crashed, but no crash dump was possible due to ips driver being unable to do crash dumps

[Matthew Dillon]

:> :
:> :What happens is that I get "syncing disks ... " Then every 5-10 seconds 
:> :a "CHKTOKEN loop 0" message, forever.
:> :
:> :Raphael
:> 
:>     You should only need to 'sysctl kern.sync_on_panic=0' for it to be
:>     able to get past the syncing disks code. 
:> 
:
:Ack, but what I meant is that syncing actually _works_ with the direct 
:panic() call in syscons.c in place of Debugger(). And I get the dump.
:
:So it looks like there is an issue with DBB and syncing, as syncing 
:fails when use together with DDB. Isn't it?
:
:This is without using the serial console.
:
:Raphael

    There are a bunch of issues with syncing, the main one being that
    it is usually just too dangerous to try to sync the buffers from a
    panic or debugger state.  I think FreeBSD no longer syncs its buffers
    on a panic and we probably should stop doing it too.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>