| To: | Peter Watkins <treestem@gmail.com> |
|---|---|
| Subject: | Re: [PATCH] 64K page size |
| From: | Thiemo Seufer <ths@networkno.de> |
| Date: | Wed, 23 Aug 2006 17:00:11 +0100 |
| Cc: | linux-mips@linux-mips.org, Ralf Baechle <ralf@linux-mips.org> |
| In-reply-to: | <44EC7125.7000000@gmail.com> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <44EC7125.7000000@gmail.com> |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mutt/1.5.13 (2006-08-11) |
Peter Watkins wrote: > Hello, > > There are a number of changes required to support larger page sizes, but > this one I thought worth sending up right away. > > The code in pgtable-64.h assumes TASK_SIZE is always bigger than a first > level PGDIR_SIZE. This is not the case for 64K pages, where task size is > 40 bits (1TB) and a pgd entry can map 42 bits. This leads to > USER_PTRS_PER_PGD being zero for 64K pages. > > If there is interest in other changes for 64K pages, I can send more. Please do so. :-) Thiemo |
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