Re: [patch 14/21] x86: add hugepagesz option on 64-bit

[Nishanth Aravamudan <nacc@us.ibm.com>]

On 04.06.2008 [02:06:10 +0200], Andi Kleen wrote:
> 
> > Also, as I said, users doesn't really know what the OS or hardware will
> > support 
> 
> The normal Linux expectation is that these kinds of users will not
> use huge pages at all.  Or rather if everybody was supposed to use
> them then all the interfaces would need to be greatly improved and any
> kinds of boot parameters would be out and they would need to be
> 100% integrated with the standard VM.
> 
> Hugepages are strictly an harder-to-use optimization for specific people
> who love to tweak (e.g. database administrators or benchmarkers). From
> what I heard so far these people like to have more control, not less.

I really don't want to get involved in this discussion, but let me just
say: "Hugepages are *right now* strictly a harder-to-use optimization".
libhugetlbfs helps quite a bit (in my opinion) as far as making
hugepages easier to use. And Adam's dynamic pool work does as well. It's
progress, slow and steady as it may be. I don't really appreciate the
entire hugepage area being pigeon-holed into what you've experienced.

Thanks,
Nish

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