15 Jan
2021
15 Jan
'21
6:40 p.m.
On Fri, Jan 15, 2021 at 01:10:27PM -0500, Pavel Tatashin wrote:
I've been thinking about this some more. Again, I am not sure this is a bug. I understand split_huge_pmd() may split the PMD size page into PTEs and leave the compound page intact. However, in order for pages[] to have non sequential addresses in compound page, those PTEs must also be migrated after split_huge_pmd(),
Why focus on migrated? Anything could happen to those PTEs: they could be COW'd, they could be mmap/munmap'd, etc.
Jason