UFS snapshot deadlocks

[Frode Nordahl]

Hello,

There has been some talk about reproducible UFS snapshot deadlocks for 
some time now on the lists, and I have not seen any recent talk about 
it.

Anyone know if there has been any progress on this issue?

The following is a 100% reproducible procedure to make it happen:

Running 5.2-CURRENT #0: Fri Jun  4 15:07:54 CEST 2004

tty1:
while (1)
	ls -la /usr/.snap
end

tty2:
dump -0af /some/where -C 32 -L /dev/ad0s1f

Looking at top(1) show mksnap_ffs being in state UFS.

I also experienced this on one of my NFS servers, when I accidently 
toyed around with ls while I started the dump. It was then hung in 
state getblk.

Cheers,
Frode