hi mark
On Thu, Feb 03, 2000 at 08:56:47AM -0500, Mark Hahn wrote:
> the problem is a lack of fairness/tuning of the request-queue. with
> ide, one stream of IO can easily starve requests for other IO; this
> is not as much an issue for SCSI since SCSI emasculates the request
> queue in favor of letting the disk sort requests (which is NOT a pure win.)
ok, that's pretty much what i was expecting...
> several (io_32big, multcount, pio_mode and unmaskirq) are irrelevant
> if using_dma is set, I think.
they don't seem to be used for normal requests. however, i noticed
that ide_build_dmatable() can fall back to PIO if the DMA setup fails
for a given request, so i figured it couldn't hurt.
thanks
-- ----------------------------------------------------------------------------- Ray Lehtiniemi (rayl@mail.com) (rayl@optitech.com)- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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