Messages in this thread | | | Date | Sun, 6 Apr 2003 18:04:09 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH] take 48-bit lba a bit further |
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On Sun, Apr 06 2003, Jens Axboe wrote: > On Sun, Apr 06 2003, John Bradford wrote: > > I originally thought that we might only be honouring 512Kb requests > > for blocks over the 28-bit limit, which Jens corrected me on, but > > maybe we *should* only do 512Kb requests on high block number, where > > we have to use 48-bit anyway. > > That makes little sense in practice, and is not currently even doable > within the block layer. You got the limits wrong, btw, it's 128kb max > for 28-bit. A single 512KiB request will have a lower per-kb overhead > with 48-bit lba than a single 128kb on 28-bit would.
I should mention that the 512KiB number is one I chose, as a good large request size. You could as high as 32MiB.
-- Jens Axboe
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