Messages in this thread | | | Date | Fri, 8 Nov 2002 12:43:18 +0100 | From | Jens Axboe <> | Subject | Re: 2.5.46: ide-cd cdrecord success report |
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On Fri, Nov 08 2002, Ingo Oeser wrote: > Hi Jens, > > On Fri, Nov 08, 2002 at 09:05:58AM +0100, Jens Axboe wrote: > > Ok I'm just about convinced now, I'll make 16 the default batch count. > > I'm very happy to hear that the deadline scheduler gets the job done > > there. > > Isn't it exactly seek_cost, which you want?
Yes it's one request for a non-contig range, or a number of contig ones. It isn't quite clear that this is always a good thing. Since we are moving request from the sorted list, there's a chance that even though serving X and then X+1 will incur a seek, it will be a small one. But for now, yes, a seek is a seek and 16 is equal to seek_cost and therefore it will be just the one.
> Would you like to make it tunable from user space somehow?
Yes of course, that has been the plan all along. I'm in fact doing that right now.
> Since Adam already noticed, that there might not be a "perfect" > value for all, this is the logical next step.
Noone ever questioned the fact that these tunables should in fact be tunable.
> PS: If you update, please consider an update of your comments > there, too ;-)
Patch is sent hours ago, and I did.
-- Jens Axboe
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