ata (raid) patches

[Michael Butler]

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Søren Schmidt wrote:
|> 3) another part of this patch is to ata-raid where the choice of drive
|> from which to read favours one side of a mirror even when both drives
|> are near the block(s) we want. Because the mirror is on another channel
|> on the Highpoint controller, it performs (marginally :-() better when we
|> toggle between them.
|
|
| Hmm, well, depends on what sort of behavior one wants to optimise for. I
| have a few other patches for optimisations but havn't decided what to
| eventually use yet. Guess its time for me to run some tests on this..

On further investigation, I'd failed to notice (doh!) that rdp->toggle
isn't preserved between requests and that one unobvious side-effect of
the original code is that it does slightly better than my patched
version .. <sigh>. I'll rework this and see if I can make it do better,

	Michael
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