Messages in this thread | | | Date | Sat, 26 May 2001 10:33:49 -0500 | From | A Duston <> | Subject | Re: PS/2 Esdi patch #8 |
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Jens Axboe wrote: > > --snip-- > > and so it continues. This is the easy way to process requests. However, > if you can start I/O on more than one buffer at the time (scatter > gather), you could then setup your sg tables by browsing the entire > request buffer_head list and initiate I/O as needed. > > Bigger requests on the queue, means more I/O in progress being possible. > There's no rule that you have to finish a request in one go, so even if > you can only handle eg 64 sectors per request with sg, you could do > just start I/O on as many segments as you can and simply don't dequeue > the request until it's completely done. So the max_sectors patch is > never really needed if you know what you are doing.
Can I still gain any advantage if the hardware can only have one I/O inflight per device? I am not sure the ps2esdi interface supports this.
Hal Duston hald@sound.net
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