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SubjectRe: [ANNOUNCE] block device interfaces changes
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> > This wouldn't be flexible enough. Many ioctls pass multiple objects around.
> "Many"? Which would those be? Haven't seen any yet.

Things like SIOCDEVPRIVATE are regularly used to pass data with pointers to
other data.

> > For the standard form the existing ioctls encode their size.
> Except that there are tons of legacy ioctls that don't ...

Yep. But we are stuck with those. Hindsight is a glorious thing.

> > size for the copy it has no code size improvement
>
> Code size?! I see no reason to even think about that in this context.

Always think about code size and speed.

> > devicecontrol in the form you give has no value outside a message passing
> > microkernel.
>
> Somehow, my memory tells me that people (including Linus) liked something
> very similar a short time back ...

Maybe, but I dont 8)

Alan


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