> On Thu, Aug 21, 2008 at 03:15:08PM +1000, Dave Chinner wrote:
> > On Thu, Aug 21, 2008 at 05:46:00AM +0300, Szabolcs Szakacsits wrote:
> > > On Thu, 21 Aug 2008, Dave Chinner wrote:
> > > Everything is default.
> > >
> > > % rpm -qf =mkfs.xfs
> > > xfsprogs-2.9.8-7.1
> > >
> > > which, according to
ftp://oss.sgi.com/projects/xfs/cmd_tars, is the
> > > latest stable mkfs.xfs. Its output is
> > >
> > > meta-data=/dev/sda8 isize=256 agcount=4, agsize=1221440 blks
> > > = sectsz=512 attr=2
> > > data = bsize=4096 blocks=4885760, imaxpct=25
> > > = sunit=0 swidth=0 blks
> > > naming =version 2 bsize=4096
> > > log =internal log bsize=4096 blocks=2560, version=2
> > > = sectsz=512 sunit=0 blks, lazy-count=0
> > > realtime =none extsz=4096 blocks=0, rtextents=0
> >
> > Ok, I thought it might be the tiny log, but it didn't improve anything
> > here when increased the log size, or the log buffer size.
>
> One thing I just found out - my old *laptop* is 4-5x faster than the
> 10krpm scsi disk behind an old cciss raid controller. I'm wondering
> if the long delays in dispatch is caused by an interaction with CTQ
> but I can't change it on the cciss raid controllers. Are you using
> ctq/ncq on your machine? If so, can you reduce the depth to
> something less than 4 and see what difference that makes?
