Re: [PATCH 2/3] mm: drop pte_clear_not_present_full()

[Oscar Salvador (SUSE)]

On Thu, Jun 11, 2026 at 01:50:48PM +0200, David Hildenbrand (Arm) wrote:
> In general, there is no good reason to do anything special when clearing
> non-present PTEs.
> 
> In theory, HW that does have to invalidate TLBs for non-present PTEs could
> benefit from a "full" parameter, but fortunately

That would be on arches like arm64 where it can cache non-present
entries, right?
Then, we could signal a global invalidation instead of doing per page.

> pte_clear_not_present_full() is not wired up anymore ... and there would
> have to be something very convincing for us to care about that to re-add
> it.
> 
> So, let's just use pte_clear() directly now.
> 
> Signed-off-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

Reviewed-by: Oscar Salvador (SUSE) <osalvador@xxxxxxxxxx>

 

-- 
Oscar Salvador
SUSE Labs