RE: process hang in zfs->io_ ?

Given time, the ZIL seems to 'catch up'. The more processes running to ZFS, the faster it seems to hang. The actual amount of data seems to matter less than the number of streams.

Putting the ZIL on a seperate disk/controller has kept the hangs from happening for me.

Thanks
Paul


-----Original Message-----
From: owner-freebsd-current_at_freebsd.org on behalf of Thomas Sparrevohn
Sent: Sun 2/1/2009 8:37 AM
To: 'Rong-en Fan'; 'FreeBSD Current'
Subject: RE: process hang in zfs->io_ ?
 
I have noticed the same error - However I am not actually sure that ZFS is the culprit - I tried to remotely log in from my laptop and the system unfroze 
 

-----Original Message-----
From: owner-freebsd-current_at_freebsd.org [mailto:owner-freebsd-current_at_freebsd.org] On Behalf Of Rong-en Fan
Sent: 01 February 2009 08:24
To: FreeBSD Current
Subject: process hang in zfs->io_ ?

I'm running current as of 20080130 on an amd64 box. I can make
processes stuck in zfs->io_ (output truncated in ddb and top) when I
make some packages via ports tinderbox. The ports tinderbox access
local disk via nfs (I also tried nullfs).

ddb output of ps and alltrace can be found at

http://www.rafan.org/FreeBSD/zfs/textdump.zfs.20090130.txt

Any ideas?

Thanks,
Rong-En Fan
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