[Devel] Re: seems to be a flaw in cfq

[Jens Axboe]

On Wed, Dec 20 2006, Jens Axboe wrote:
> I'm still seeing odd results with buffered io, while the direct case is
> definitely fixed. So we are either looking at two bugs, or one bug that
> the merge fixup hides.

Ah hang on, buffered reads will be serialized by the page cache. If I
rerun the buffered randread case with anticipatory, the results are
skewed in the other direction but still unfair. So I'm not sure there's
a real bug there in the io scheduler.

-- 
Jens Axboe