Messages in this thread | | | Date | Sat, 5 Nov 2005 17:37:24 +1100 | From | Dave Airlie <> | Subject | Re: [PATCH] ppc64: 64K pages support |
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> What was the problem with drivers ? On ppc64, it's all hidden in the > arch code. All the kernel sees is a 64k page size. I extended the PTE to > contain tracking informations for the 16 sub pages (HPTE bits & hash > slot index). Sub pages are faulted on demand and flushed all at once, > but it's all transparent to the generic code. >
We did that with the VAX port about 5 years ago :-), granted for different reasons..
The VAX has 512 byte hw pages, we had to make a 4K pagesize for the kernel by grouping 8 hw pages together and hiding it all in the arch dir..
granted I don't know if it broke any drivers, we didn't have any...
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