Messages in this thread | | | Date | Sun, 30 Nov 2003 19:17:23 +0100 | From | Jens Axboe <> | Subject | Re: Silicon Image 3112A SATA trouble |
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On Sun, Nov 30 2003, Vojtech Pavlik wrote: > On Sun, Nov 30, 2003 at 06:10:06PM +0100, Jens Axboe wrote: > > > On Sun, Nov 30 2003, Jeff Garzik wrote: > > > Bartlomiej Zolnierkiewicz wrote: > > > >On Sunday 30 of November 2003 17:51, Jens Axboe wrote: > > > >>>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. > > > > > > Well, the constraint we must satisfy is > > > > > > sector_count % 15 != 1 > > > > (sector_count % 15 != 1) && (sector_count != 1) > > > > to be more precise :) > > I think you wanted to say: > > (sector_count % 15 != 1) || (sector_count == 1)
Ehm no, I don't think so... To my knowledge, sector_count == 1 is ok. If not, the hardware would be seriously screwed (ok it is already) beyond software fixups.
-- Jens Axboe
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