gjournal questions

[Pawel Jakub Dawidek]

On Fri, Sep 01, 2006 at 10:16:09AM -0500, Kevin Kramer wrote:
> I've already redone the whole thing. here are the steps i took
> 
> umount /scr09
> umount /scr10
> gjournal stop da2.journal
> gjournal stop da4.journal
> 
> ** had not done this on the first attempt
> newfs /dev/da1
> newfs /dev/da3

This is not needed.

> gjournal label -v /dev/da2 /dev/da1
> gjournal label -v /dev/da4 /dev/da3
> 
> newfs -J -L scr09 /dev/da2.journal
> newfs -J -L scr10 /dev/da4.journal
> 
> mount /scr09
> mount /scr10

Don't know how your /etc/fstab looks like, but you definiately should
use 'async' mount option, which is safe to use with gjournaled file
systems.

> it is looking much better so far. before, i was getting this in the debug (only on /scr10) and my mountd process was always the top process
> 
> Sep  1 00:00:11 donkey kernel: fsync: giving up on dirty
> Sep  1 00:00:11 donkey kernel: 0xc9ee1bb0: tag devfs, type VCHR
> Sep  1 00:00:11 donkey kernel: usecount 1, writecount 0, refcount 198 mountedher
> e 0xc9ebfb00
> Sep  1 00:00:11 donkey kernel: flags ()
> Sep  1 00:00:11 donkey kernel: v_object 0xc9fbb528 ref 0 pages 5933
> Sep  1 00:00:11 donkey kernel: lock type devfs: EXCL (count 1) by thread 0xc9bd4
> 180 (pid 38)
> Sep  1 00:00:11 donkey kernel: dev ufs/scr10
> Sep  1 00:00:11 donkey kernel: GEOM_JOURNAL: Cannot suspend file system /scr10 (
> error=35).

It happens sometimes under load, haven't investigated yet what exactly
is happening, but you can ignore it for now, it's harmless, it just
means journal switch will be done a bit later.

BTW. 8GB for journals is much. You should not need more than 2GB
probably. Of course it will work with 8GB just fine.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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