On Mon, Mar 30, 2009 at 04:24:15PM +0800, Zhang Le wrote:
> > Hi all,
> > We are willing to use 16k page size to avoid cache alias problem.
> > The Linux version we use is 2.6.12. If we just upgrade mm system to
> > support 16k page size, what else problems will happen?
> > There is already one thing we know that applications of ELF format
> > applications should be transformed to be 16k alignment.
> > Another one, we think, highly suspected to be problematic is that many
> > drivers will be ok for 4k page size but fails for 16k.
> > That is because 4k page size had been seemed to be natural for a very
> > long long time.
> > Any other problem that shall happen for 16k page size?
> Linux on Loongson 2E and 2F uses 16k page size to avoid cache alias problem,
> However, I haven't encountered any problem on Linux kernel itself due to 16k
> Anyway, I am not 100% familiar with Loongson patches, so I am not sure whether
> the page size problem is already been taken care of in the patch. If you are
> interested to find out yourself, you can get the whole source here:
I've got a report that Fulong is currently only working with 16k pages. So
4k is no longer the bullet proof choice for all cases :)