Dave Hansen wrote:
You probably want mlock(2) to keep the kernel from messing with the ptes at all.
mlock() can only be called via sys_mlock(), which is a user-space call. Not only that, but only root can call sys_mlock(). This is not compatible with our needs.
> But, you should probably really be thinking about why you're
accessing the page tables at all. I count *ONE* instance in drivers/ where page tables are accessed directly.
I access PTEs to get the physical addresses of a user-space buffer, so that we can DMA to/from it directly.
-- Timur Tabi Staff Software Engineer timur.tabi@xxxxxxxxxxx
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