Messages in this thread | | | Date | Tue, 4 Jul 2006 09:32:49 +0800 | From | Fengguang Wu <> | Subject | Re: [PATCH 7/7] iosched: introduce deadline_kick_page() |
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Jens,
On Wed, Jun 28, 2006 at 01:27:32PM +0200, Jens Axboe wrote: > > The overhead of deadline_kick_page() becomes large when the request is > > large (256 pages). But I guess there's way to optimize it: > > - most requests will be consisted of a set of continuous pages, i.e. a > > range comparison will be sufficient. > > - for a system with lots of queued requests(>100), maybe the gain can > > well pay for the overheads? > > Sorry, there's just no way that something like that is acceptable for > inclusion. I don't care much about the overhead numbers (I can see from > the code that it sucks :-), I wanted to see some numbers on what > scenarios this helps performance and by how much.
Ok, thanks. I hope that I'll be able to bring with some performance numbers the next time :-)
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