Messages in this thread | | | Date | Sun, 30 Nov 2003 18:13:21 +0100 | From | Jens Axboe <> | Subject | Re: Silicon Image 3112A SATA trouble |
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On Sun, Nov 30 2003, Bartlomiej Zolnierkiewicz wrote: > > On Sunday 30 of November 2003 18:08, Jens Axboe wrote: > > On Sun, Nov 30 2003, Bartlomiej Zolnierkiewicz wrote: > > > > Yes, it would be better to have a per-drive (or hwif) extra limiting > > > > factor if it is needed. For this case it really isn't, so probably not > > > > the best idea :) > > > > > > > > > Tangent: My non-pessimistic fix will involve submitting a single > > > > > sector DMA r/w taskfile manually, then proceeding with the remaining > > > > > sectors in another r/w taskfile. This doubles the interrupts on the > > > > > affected chipset/drive combos, but still allows large requests. I'm > > > > > not terribly > > > > > > > > Or split the request 50/50. > > > > > > We can't - hardware will lock up. > > > > I know the problem. Then don't split 50/50 to the word, my point was to > > split it closer to 50/50 than 1 sector + the rest. > > Oh, I understand now and agree.
Cool. BTW to make myself 100% clear, I don't mean "split" as in split the request, merely the amount issued to the hardware. Request splitting has such an ugly ring to it :)
-- Jens Axboe
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