Re: [PATCH 1/5] freepgt: free_pgtables use vma list

[Nick Piggin]

David S. Miller wrote:
> On Wed, 23 Mar 2005 10:32:10 +1100
> Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
>
>
> > I think David's on the right track - I think there's something a
> > bit wrong at the top. In my reply to Andrew in this thread I
> > posted a patch which may at least get things working...
>
>
> We have to do the "if (ceiling)" check in every spot where
> we mask it in some way, and if it falls to zero from non-zero
> due to the masking, we skip.
>
> That gives me a mostly working kernel.

I see. Tricky.

> Bad news is that while lat_proc's fork and exec tests improve
> dramatically, shell performance is way down on sparc64.
> I'll post before and after numbers in a bit.  Note, this is
> just with Hugh's base patch plus bug fixes.

That's interesting. The only "extra" stuff Hugh's should be
doing is the vma traversal.

The single walk patch seems to fit in quite well with Hugh's
updated patchset. I haven't quite worked out how to best do
hugepages, but it is easily possible. But I won't dust that
off again until Hugh's is nicely tested and working.

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