Messages in this thread | | | Date | Tue, 2 Dec 2003 13:49:14 -0500 | From | Jeff Garzik <> | Subject | Re: libata in 2.4.24? |
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On Tue, Dec 02, 2003 at 10:46:48AM -0800, Mike Fedyk wrote: > On Tue, Dec 02, 2003 at 01:04:58PM -0500, Jeff Garzik wrote: > > On Tue, Dec 02, 2003 at 09:40:48AM -0800, Mike Fedyk wrote: > > > There are PATA drives that do TCQ too, but you have to look for that feature > > > specifically. IDE TCQ is in 2.6, but is still experemental. I think Jens > > > Axboe was the one working on it IIRC. He would have more details. > > > > Let us distinguish three types of TCQ: > > 1) PATA drive-side TCQ (now called "legacy TCQ") > > 2) Controller-side TCQ > > 3) SATA drive/controller-side TCQ ("first party DMA") > > > > libata will never support #1, which is what 2.6 supports in experimental > > option. > > An experemental option with the ide layer, not libata, right?
Correct.
> > libata will support #2 very soon, and will support #3 when hardware is > > available. > > > > If you have Controller-side TCQ, then will it work with any IDE PATA/SATA > drive?
Yes.
Jeff
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