Messages in this thread | | | Date | Sun, 28 Mar 2004 14:51:24 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] speed up SATA |
| |
Jeff Garzik wrote: > TCQ-on-write for ATA disks is yummy because you don't really know what > the heck the ATA disk is writing at the present time. By the time the > Linux disk scheduler gets around to deciding it has a nicely merged and > scheduled set of requests, it may be totally wrong for the disk's IO > scheduler. TCQ gives the disk a lot more power when the disk integrates > writes into its internal IO scheduling.
Does TCQ-on-write allow you to do ordered write commits, as with barriers, but without needing full cache flushes, and still get good performance?
In principle I think the answer is yes, but what is the answer with real disks in practice?
-- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |