Re: [00/17] Large Blocksize Support V3

Jens Axboe
2007-04-26T16:08:50Z

On Thu, Apr 26 2007, Christoph Hellwig wrote:
> On Thu, Apr 26, 2007 at 04:38:54PM +1000, Nick Piggin wrote:
> > Hardware is built to handle many small pages efficintly, and I don't
> > understand how it could be an SGI-only issue. Sure, you may have an
> > order of magnitude or more memory than anyone else, but even my lowly
> > desktop _already_ has orders of magnitude more pages than it has TLB
> > entries or cache -- if a workload is cache-nice for me, it probably
> > will be on a 1TB machine as well, and if it is bad for the 1TB machine,
> > it is also bad on mine.
>
> It's not an SGI-only issue, but apparently SGI are the only ones
> that actually care about real highend linux setups to work on these
> issues. The Problem is not on the CPU hardware side. It's on
> the Software side and Storage hardware side, or rather a combination
> of the two.

Agree. I don't know why we are arguing the merrits of this, it's an
obvious win. The problem is more if it's doable this way or not due to
fragmentation, but that's a different discussion and should be kept
seperate.

--
Jens Axboe