Re: [PATCH]Fix broken VMI in 2.6.27-rc..

[H. Peter Anvin]

Jeremy Fitzhardinge wrote:
> > No, but it's hardly vast effort, either.
>
> Thinking about it, the fixmap really has to be as high as possible.  If 
> it were any lower, then it would either truncate the 1:1 mapping, or 
> shadow some physical memory.

The proposal was to put it *before* the 1:1 mapping:

FIX_HOLE would start at TASK_SIZE
PAGE_OFFSET would shift to TASK_SIZE + PMD_PAGE_SIZE

All the remaining offsets remain as-is.

It's slightly less efficient than the current version, since we can't 
share the PDE page for the fixmap with the final vmalloc map, but not 
terribly so.

	-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/