Re: [PATCH] 2.4.20-rmap15a

[Con Kolivas]

Quoting Marc-Christian Petersen <[e-mail]>:

> On Sunday 01 December 2002 22:25, you wrote:
> 
> Hi Rik,
> 
> > That was my gut feeling as well, but I guess it's a good thing
> > to quantify how much of a difference it makes.  I wonder if we
> > could convince Con to test a kernel both with and without this
> > patch and look at the difference.
> yep, would be a good idea. Con: *wake up ;)*

Sorry sleep and work intervene ;)

I have already tested it in -ck and was planning to put it into 2.4.20-ck1 when
I finished it. I'll test it in vanilla to show how it works. It made a
thunderous difference to io load.

Con

> 
> > > So, here my patch proposal. Ontop of 2.4.20-rmap15a.
> > Looks good, now lets test it.  If the patch is as needed as you
> > say we should push it to marcelo ;)
> yep, Andrew should do it. Anyway, all those patches do _not_ get rid of those
> 
> I/O pauses/stops since 2.4.19-pre6. Andrea did a good approach with his 
> lowlatency elevator, even if it drops throughput (needs more testing to 
> become equivalent to throughput w/o it) and also Con and me did a Mini 
> Lowlatency Elevator + Config option, so you can decide weather you are 
> building for serverusage where interactive "desktop performance" is not 
> needed ;) or not.
> 
> I wish I'll have the time to eleminate the broken code which went into 2.4.19
> 
> that causes those I/O stops.
> 
> *Repetition: those stopps do not occur with 2.4.18* ;)
> 
> ciao, Marc
> 
>