Re: [2.6.6-mm4-ff1] I/O context isolation

[FabF <Fabian.Frederick@skynet.be>]

On Fri, 2004-05-21 at 09:38, Nick Piggin wrote:
> FabF wrote:
> > Jens,
> > 
> > 	Here's ff1 patchset to have generic I/O context.
> > ff1 : Export io context operations from blkdev/ll_rw_blk (ok)
> > ff2 : Make io_context generic plateform by importing IO stuff from
> > as_io.
> > 
> 
> Can I just ask why you want as_io_context in generic code?
> It is currently nicely hidden away in as-iosched.c where
> nobody else needs to ever see it.
I do want I/O context to be generic not the whole as_io.
That export should bring:
	-All elevators to use io_context
	-source tree to be more self-explanatory
	-have a stronger elevator interface

> 
> > 	AFAICS, cfq_queue for instance could disappear when using io_context
> > but I think elv_data should remain elevator side....
> > I don't want to go in the wild here so if you've got suggestions, don't
> > hesitate ;)
> > 
> 
> cfq_queue is per-queue-per-process. io_context is just
> per-process, so it isn't a trivial replacement.
But I guess we can merge that stuff to have "a one way, one place" code
rather than repeat code in all elv.

Regards,
FabF