Re: 2.4.22pre6aa1

From: Andrea Arcangeli (
Date: Fri Jul 18 2003 - 17:27:50 EST

On Fri, Jul 18, 2003 at 07:18:53PM +0100, Christoph Hellwig wrote:
> On Thu, Jul 17, 2003 at 12:28:57PM +0200, Andrea Arcangeli wrote:
> > Only in 2.4.21rc8aa1: 9910_shm-largepage-13.gz
> > Only in 2.4.22pre6aa1: 9910_shm-largepage-16.gz
> >
> > Thanks to Hugh for the help in porting the bigpages
> > to the rewritten shmfs layer in 22pre. No idea at the moment if it
> > works or if it only compiles.
> Any reason you don't use a backport of hugetlbfs like the IA64 or
> the RH AS3 tree?

bigpages= is a documented API that has to be used in production, so I
can easily add the hugetlbfs API but I guess I've to keep this one
anyways. I also would need to verify the performance of hugetlbfs before
suggesting migrating to it, for example I don't want
preallocation/prefaulting (IIRC hugetlbfs preallocates everything). I
also like the single huge array of page pointers, that is very hardwired
but optimal for those workloads.

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