On Thu, Feb 23, 2006 at 05:13:36PM -0800, Andrew Morton wrote:
> Badari Pulavarty <[email protected]> wrote:
> >
> > I am still trying to understand the whole proposal to give you better
> > feedback. But, my gut feeling is - its not going to be any more simpler
> > than what we have today :(
> >
>
> Yes, that's my general reaction as well. That code's solving a complex and
> messy problem, so it got complex and messy.
True. As you say, we just understand extent of the problem better now.
I think Stephen put in considerable thought into the implementation for
2.4, but at that time he probably didn't have to contend with the
locking modes and AIO, which have exposed a lot more scenarios, especially
with regard to error handling.
>
> Of course, a reimplementation might certainly end up faster, cleaner,
> better. A throw-away-and-reimplement exercise often has that result, but
> mainly because on the second time the reimplementors understand the full
> scope of the problem at the outset rather than at the end. So this time
> around, as you imply, we'd need to get a full problem description and set
> of testcases collected.
>
> That code does a _lot_ of stuff. Fortunately, It's basically all in
> direct-io.c and that file exports a single function. So it's possible that
> a reimplmentation could tick along alongside the existing implementation and
> ideally, it's just a matter of changing one entry in each filesystem's a_ops.
Sounds like a good idea.
Regards
Suparna
>
> --
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--
Suparna Bhattacharya ([email protected])
Linux Technology Center
IBM Software Lab, India
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