David Hildenbrand <david@xxxxxxxxxx> wrote: > > [ 121.992093][ T2220] WARNING: CPU: 6 PID: 2220 at mm/gup.c:76 try_get_folio (mm/gup.c:76 (discriminator 1)) > > I assume we have a refcount underflow (but could be an overflow?). Maybe we > used unpin_user_page() on a page not pinned via pin_user_pages() ? Looking at the disassembly and the register dump, this would appear to be the counter: > RAX: 00000000fffffc01 So my guess it's an underflow by 1 pin. David
