Re: [PATCH] new data logging and quota patches available

[Chris Mason <mason@suse.com>]

On Sun, 2003-02-23 at 20:42, Manuel Krause wrote:
> On 02/23/2003 06:18 PM, Chris Mason wrote:
> > I've attached a new kinoded-9.diff.gz, it will apply to both -aa and
> > vanilla.  Please give it a try.
> > 
> > -chris
> 
> Hi and thank you!
> 
> I've replaced the old patch. And the problem is gone -- the partitions 
> are umountable again after copying.
> 

Good to hear

> I see a performance decrease with my copies in data=ordered mode by 
> about 7.5% compared to the 2.4.20-pre10-data-logging (it's about 19% 
> decrease for 2.4.21-pre4 since 2.4.19-data-logging). What is causing 
> this? Partly I can blame it on the disk content distribution that 
> changed. If I removed the kinoded related patches would the throughput 
> rate increase?

That's odd, tests here show performance increasing but I'm testing
2.4.21-pre4 + old data logging vs 2.4.21-pre4 + new data logging

Could I talk you into trying to narrow this down?  Perhaps starting with
a benchmark of the same dataset on both kernels?  The new data logging
code kicks kreiserfsd in sooner to service async commits.  So if your
benchmark lasts < 30 seconds, it is possible the older kernels never did
writes at all during the run.

-chris