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.
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