Re: [RFC] atomic pte updates for x86 smp

Ingo Molnar
2000-10-12T11:10:22Z

On Thu, 12 Oct 2000, Ingo Molnar wrote:

> [...] pgd_clear() should stay a 64-bit operation [...]

even this isnt strictly necessery - pgds and pmds are allocated in 'low
memory', and thus a simple 32-bit write to the lower 32 bits of the pgd
entry is enough to clear a PAE pgd. But it still must be a special case
due to the pgd present-bit restriction.

Ingo