Re: [00/17] Large Blocksize Support V3

From: Christoph Lameter
Date: Fri Apr 27 2007 - 23:49:45 EST

On Sat, 28 Apr 2007, David Chinner wrote:

> > 1-disk and 2-disk read throughput fell by an improbable amount, which makes
> > me cautious about the other numbers.
> For read, yes, and it's because something is going wrong with the
> I/O size - it looks like readahead thrashing of some kind even
> with 4k pages tests.

Yup. I seem to have a problem in that area with my patches. Somehow the
nr of page is shifted by page order. I do not completely understand what
is going on there yet.

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