On Wed, 19 Oct 2022 11:17:14 -0700 Yang Shi <shy828301@xxxxxxxxx> wrote: > > The intent of commit b653db77350c patch was to avoid the case where > > PG_private is clear but folio->private is not-NULL. However, THP tail > > pages uses page->private for "swp_entry_t if folio_test_swapcache()" as > > stated in the documentation for struct folio. This patch only clobbers > > page->private for tail pages if the head page was not in swapcache and > > warns once if page->private had an unexpected value. > > It looks like the same issue fixed by > https://lore.kernel.org/linux-mm/20220906190602.1626037-1-bfoster@xxxxxxxxxx/ It is. As I asked earlier this week, what about reverting b653db77350c? Why do we care about the value of ->private for non-PG_private pages?
