Re: [00/17] Large Blocksize Support V3

Nick Piggin
2007-04-27T13:06:53Z

William Lee Irwin III wrote:
> William Lee Irwin III wrote:
>
>>>I readily concede that seeks are most costly. Yet memory contiguity
>>>remains rather influential.
>>>Witness the fact that I'm now being called upon a second time to
>>>adjust the order in which mm/page_alloc.c returns pages for the
>>>sake of implicitly establishing IO contiguity (or otherwise
>>>determining why things are coming out backward now).
>
>
> On Fri, Apr 27, 2007 at 08:22:07PM +1000, Nick Piggin wrote:
>
>>Just a random aside question... doesn't Oracle db do direct IO from
>>hugepages?
>
>
> If and when configured to use direct IO and hugepages, yes.

Sweet. I wonder if you would see a much improvement for allowing more
than 128 sglist entries, then.

> It's also
> noteworthy thar Oracle has more code than its database.

Anything noteworthy in this context, that you care to note?

--
SUSE Labs, Novell Inc.