Again... :-(

Patch included this time...

/RogerL


Roger Larsson wrote:
> 
> Hi Linus,
> 
> Cleaned up and corrected some bugs...
> (memory_pressure... !
>  unintended reschedule removed)
> 
> Sadly the performance went down - slightly.
> Latency looks even nicer. Still some spikes.
> [sync and mmap002 behaviour not corrected]
> 
> /RogerL
> 
> Roger Larsson wrote:
> >
> > Hi Linus,
> >
> > [patch against  linux-2.4.0-test3-pre2]
> >
> > I cleaned up kswapd and moved its reschedule point.
> > Disk performance is close to the same.
> > Latencies have improved a lot (tested with Bennos latencytest)
> >
> > * sync is still problematic
> > * mmap002 (Quintinela) still gives a 212 ms latency
> >   (compared to 423 ms for the unpatched...)
> > * other disk related latencies are down under 30 ms.
> >   (streaming read, copy, write)
> > * the number of overruns has dropped considerably!
> >   (running 4 buffers with a deadline of 23 ms)
> >
> > /RogerL
> >
> > --
> > Home page:
> >   http://www.norran.net/nra02596/
> >
> >   ------------------------------------------------------------------------
> >                                               Name: patch-2.4.0-test3-pre2-vmscan.latency.2
> >    patch-2.4.0-test3-pre2-vmscan.latency.2    Type: Plain Text (text/plain)
> >                                           Encoding: 7bit
> 
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