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

[Dave Hansen <dave@linux.vnet.ibm.com>]

On Wed, 2008-06-04 at 09:01 -0700, Dave Hansen wrote:
> On Wed, 2008-06-04 at 03:04 +0200, Nick Piggin wrote:
> > So I won't oppose this being tinkered with once it is in -mm or upstream.
> > So long as we try to make changes carefully. For example, there should
> > be no reason why we can't subsequently have a patch to register all
> > huge page sizes on boot, or if it is really important somebody might
> > write a patch to return the 1GB pages to the buddy allocator etc.
> > 
> > I'm basically just trying to follow the path of least resistance ;) So
> > I'm hoping that nobody is too upset with the current set of patches,
> > and from there I am very happy for people to submit incremental patches
> > to the user apis..
> 
> That sounds like a good plan to me.  Let's see how the patches look on
> top of what you have here.

I managed to implement most of this, but I'm not happy how it came out.
It's not quite functional, yet.

I don't think it is horribly worth doing unless it can simplify some of
what is there already, which this can't.  I basically ended up having to
write another little allocator to break down the large pages into
smaller ones.  That's sure to have bugs.

http://userweb.kernel.org/~daveh/boot-time-hugetlb-reservations.patch

-- Dave

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