Re: [PATCH][2.6-mm] Readahead issues and AIO read speedup

From: Joel Becker (jlbec@evilplan.org)
Date: Thu Aug 07 2003 - 14:36:43 EST

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On Thu, Aug 07, 2003 at 09:28:00AM -0700, Andrew Morton wrote:
> If the database pagesize is 16k then the application should be submitting
> 16k reads, yes? If so then these should not be creating 4k requests at the
> device layer! So what we need to do is to ensure that at least those 16k

Um, I thought bio enforced single CDB I/O for contiguous chunks
of disk! If it doesn't, 2.6 is just as lame as 2.4.

Joel

"Three o'clock is always too late or too early for anything you want to do." - Jean-Paul Sartre

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