Re: [PATCH] drop-behind fix for generic_file_write

[Daniel Phillips]

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