Re: [00/17] Large Blocksize Support V3

William Lee Irwin III
2007-04-26T15:58:19Z

On Fri, Apr 27, 2007 at 01:38:30AM +1000, Nick Piggin wrote:
> Or good grounds to increase the sg limit and push for io controller
> manufacturers to do the same. If we have a hack in the kernel that
> mostly works, they won't.

On Fri, Apr 27, 2007 at 01:38:30AM +1000, Nick Piggin wrote:
> Page colouring was always rejected, and lots of people who knew
> better got upset because it was the only way the hardware would go
> fast...

Yes, stunning wisdom there. Reject the speedups.

On Fri, Apr 27, 2007 at 01:38:30AM +1000, Nick Piggin wrote:
> You could put it that way. Or that it is wrong because of the
> fragmenatation problem. Realise that it is somewhat fundamental
> considering that it is basically an unsolvable problem with our
> current kernel assumptions of unconstrained kernel allocations and
> a 1:1 kernel mapping.

Depends on what you consider a solution. A broadly used criterion is
that improves performance significantly in important usage cases.

-- wli