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, too. > However, I haven't encountered any problem on Linux kernel itself due to 16k page > size. > > 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: > http://repo.or.cz/w/linux-2.6/linux-loongson.git 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 :) Ralf
