Re: Poor performance during disk writes

Robert Love
2001-12-20T19:03:09Z

On Thu, 2001-12-20 at 09:35, Dieter N?tzel wrote:

> > Robert maintains latency measurement patch, do you use it?
>
> Yes, I did the ReiserFS lock-break tests for him.
>
> > Does it show where are the problems?
>
> NO, we have no clue, yet :-(

Want to see if its the VM? Rik van Riel has updated his 2.4-ac VM for
new kernels and added reverse page mapping (a neat feature).

It is available at:
http://www.surriel.com/patches/2.4/2.4.16-rmap-6

Give it a whirl, you might me impressed. If not, maybe we can scratch
the VM as the problem and stare meanly at VFS ;-)

(Note my lock-break patch will fail on the new VM. Ignore it. The rest
is still fine. Perhaps I'll do a lock-break for this VM later).

Robert Love