Re: [PATCH] IDE TCQ #4

[Martin Dalecki <dalecki@evision-ventures.com>]

Jens Axboe wrote:
> On Thu, Apr 18 2002, Martin Dalecki wrote:
> 
>>Jens Axboe wrote:
>>
>>>On Thu, Apr 18 2002, Martin Dalecki wrote:
>>>
>>>
>>>>Jens Axboe wrote:
>>>>
>>>>
>>>>>On Thu, Apr 18 2002, Martin Dalecki wrote:
>>>>>
>>>>>
>>>>>
>>>>>>BTW>  Jens: Do you have any idea what the "sector chaing" in ide-cd is
>>>>>>good for?! I would love to just get rid of it alltogether!
>>>>>
>>>>>
>>>>>Sector chaining? Are you talking about the cdrom_read_intr() comments?
>>>>
>>>>Sorry I did mean sector caching.
>>>
>>>
>>>That's for padding/caching sub-frame sized reads.
>>
>>I tought the BIO layer did this alredy... Well it's a pain
> 
> 
> Nope, it does not.
> 
> 
>>in the a** to deal with it. IDE-FLOPPY is passing packet commands
> 
> 
> It sure is... sr doesn't do it and lots of others don't as well, so I
> suppose we could rip it out. We already require reblocking with loop in
> those cases anyway.
> 
> 
>>through the request buffer but IDE-CD is passing them through
>>request special field... argh!
> 
> 
> So kill ->special usage in ide-cd and use ->buffer?

That's the idea, but the caching code mentioned above
is abusing it already in a way I can't grasp wholly immediately.

> 



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