On Wed, Feb 12, 2025 at 02:08:06PM +0100, Claudio Imbrenda wrote: > On Wed, 12 Feb 2025 13:44:58 +0100 > Alexander Gordeev <agordeev@xxxxxxxxxxxxx> wrote: > > [...] > > > The above is however not exactly the same, since set_pte_range() -> set_ptes() > > dirtyfies all PTEs in a folio - unlike the current s390 implementation, which > > dirtyfies a single PTE based on its struct page flag. > > I have not looked enough into this specific matter to actually have an > opinion, but I just want to quickly point out that in the next couple > of years struct page as we know it will go away, and flags will only be > per-folio anyway. Most flags have been per-allocation rather than per-page for many years. Specifically, the dirty flag has been per-allocation since January 2016 in commit df8c94d13c7e
