Re: Data-logging and md as / fs bug

[Manuel Krause <manuelkrause@netscape.net>]

Hi and thank you, for the quick reply!

On 05/13/2003 04:25 PM, Oleg Drokin wrote:
> Hello!
> 
> On Tue, May 13, 2003 at 04:15:30PM +0200, Manuel Krause wrote:
> 
> 
>>Do you have something new to try? Does this original patch affect disk 
>>i/o perfomance (positive/negative)?
> 
> 
> No. I have old patch instead that applies to 2.4.20 and basically every other kernel
> and that I am pushing to Marchelo as this iget5_locked is too intrusive at current 2.4
> development stage.

In what kind? Or: What kind of intrusion do you mean then (see below)?!

> This old patch is attached.
> 
> 
>>Always appreciated are less intrusive ones regarding i/o speed ;-))
> 
> 
> I/O speed should be the same with all the aproaches.
> The patch below is a bit more cpu hungry as it introduces one more spinlock.
> 
> Bye,
>     Oleg
[Patch]

But, errhm, why should I use a patch that uses more cpu and doesn't 
speed up disk i/o (see above)???

I only did a very little testing when the discussions on 
iget5_locked_for-2.4.21-pre5-datalogging.diff, kinoded-? + 
inode-dirty-for-kinoded began. And it seemed that kinoded + inode-dirty 
doesn't make a difference without quota (as Chris already pointed out) 
but that I loose 2s on OpenOffice- and 1s on Netscape7-startup time 
without your -pre5 patch. Is that possible or should I improve my 
looking-at-the-clock or re-verify that?


Thanks,

  Manuel