[Cbe-oss-dev] [PATCH] ps3_storage scheduling while atomic

[Geert Uytterhoeven]

On Mon, 29 Jan 2007, Florin Malita wrote:
> Geert Uytterhoeven wrote:
> > On Sun, 28 Jan 2007, Florin Malita wrote:
> > > Any plans to address this? Any input on the patch?
> > 
> > Sorry, in the mean time I haven't really looked at the storage driver
> > anymore
> > (busy with ps3av and ps3fb). I'll resume storage work soon.
> 
> Sounds good, thanks.
> 
> One thing I noticed is some pretty serious performance degradation when moving
> from 2.6.16 to the latest tree. Don't have any hard numbers to back it up at
> the moment but an informal hdparam -t dropped from ~27MB/s to ~15MB/s and disk
> I/O seems to make the X server freeze for short periods.

Yes, there's a known performance issue with 2.6.20. It's not related to the
storage driver, though. Binding all interrupts to CPU #0 made it less severe,
but it's still there.

> OTOH, the new configuration is probably pretty different from the stock 2.6.16
> so there might be something else besides the storage driver affecting it. Is
> the current storage driver fundamentally different from what's in 2.6.16 or is
> it supposed to be just a port?

The core of the storage driver is still the same.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
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