Martin S. Weber wrote:

>On Tue, Jun 29, 2004 at 11:29:45PM +0100, sigsegv@rambler.ru wrote:
>  
>
>>(...) I experience frequent system lock-ups druing heavy I/O operations
>>on UFS2 filesystems mounted with "softdep" option.
>>(...)
>>My question is has anyone experienced the same problem, is it a well 
>>known bug, where should I look for the cause of the problem?
>>    
>>
>
>As much as I hate to say it, but I have -never ever- been able to run
>with softdeps stably. Not ever all the way back pre-1.6. Lockups after
>shutdown, lockups during normal operation, it's a big gamble, and never
>seems to hit all people. I have one machine left running with softdeps
>which is working fine (on a scsi disk, whatever that's worth -- although,
>I'm still waiting for the next kernel panic!), all the others grinded to 
>a halt earlier or later. LFS nor softdeps are 'production environment' 
>ready, that's it. Yes it hurts, but that's it.
>
>On the other hand, if you have "reproducible" lockups, some kernel-savvy
>guys might need your input to fix these/your issues. Good luck :)
>
>-Martin
>
>  
>
Well it shouldn't be hard to reproduce them, on my system they happen 
way too often. I am new to NetBSD, so I'll read about how to use kernel 
debugger etc and see how far I can get with it.

P.S. what's the status on FreeBSD's softdep? Is it more stable?