On 18.03.21 19:03, Rik van Riel wrote:
On Thu, 2021-03-11 at 19:14 +0100, David Hildenbrand wrote:
Hi folks,
I was wondering, is there any mechanism that reclaims basically
empty
page tables in a running process?
Currently we have do_munmap -> unmap_region -> free_pgtables,
which is hooked up only to sys_munmap.
We don't seem to have an equivalent for the various MADV_
options that lead to freed memory.
The other path I am interested in is doing an
fallocate(FALLOC_FL_PUNCH_HOLE)/MADV_REMOVE on a shared file/mapping,
resulting in the same situation AFAIKS.
--
Thanks,
David / dhildenb
