On Sat, May 22, 2021 at 12:55 PM <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > The patch titled > Subject: mm: improve mprotect(R|W) efficiency on pages referenced once > has been removed from the -mm tree. Its filename was > mm-improve-mprotectrw-efficiency-on-pages-referenced-once.patch > > This patch was dropped because it had testing failures Hi Andrew, Do you have a link to more information about these testing failures? I don't think I received anything. Or is this about the uffd issue reported by Peter Xu? I have a fix for that which I'll include in v4, together with a switch from page_refcount to page_count to fix an issue reported off-list. Peter