Re: [PATCH] libata-core More robust parsing for multi_count(v5)

[Jeff Garzik <jgarzik@pobox.com>]

Tejun Heo wrote:
> Mark Lord wrote:
>> Sure, it will blindly use it if the drive appears to be already configured
>> for it at startup.  But I don't see any where that we issue "SET MULTIPLE"
>> commands or otherwise support turning it on/off or tuning it.
>>
>> I wonder if we even snoop the SET MULTIPLE command from SG_IO /
>> ATA_{12,16}?
>>
>> This is more of an infrastructure thing than a driver-specific setting,
>> so I'm hoping that one of you three (who know the code a lot better
>> than I do) might think about that for the future.
> 
> Right, libata doesn't have any multiple sector related configuration
> whatsoever.  Maybe I'll give it a shot.


Yeah, that has long been a design decision -- avoid all the mechanics of 
PIO-Multi, simply because we did not have much of a need for it (and 
still don't).

Albert Lee worked on PIO-Multi a while ago, which was mainly to get 
ATA_{12,16} working, IIRC.

But overall, I don't see much of a need to introduce it into the main stack?

	Jeff