On Wed, 03 Jan 2001, Rik van Riel wrote:
> Hi Linus, Alan,
>
> the following (trivial) patch fixes drop-behind behaviour
> in generic_file_write to only drop fully written pages.
>
> This increases performance in dbench by about 8% (as
> measured by Daniel Phillips) and should get rid of the
> logfile bottleneck Ingo Molnar found with the drop-behind
> call in generic_file_write in TUX tests.
Rik, I detected the speedup in -pre5 but it disappeared in -pre7 (which
turned in a faster performance than pre5 or 6 anyway). I don't have an
explanation for that. The idea makes sense: treat a partial page as
'in play' until completely full, then deactivate it.
--
Daniel
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