On Sat, Jan 10, 2015 at 11:47 AM, Laszlo Ersek <ler...@redhat.com> wrote: > > I grepped the tree for "fullmm", and only tlb_gather_mmu() seems to set > it. There are several instances of that function, but each sets fullmm to: > > /* Is it from 0 to ~0? */ > tlb->fullmm = !(start | (end+1)); > > So, a nonzero fullmm seems to imply (end == ~0UL).
Yes. But note how it imples "end == ~0ul", but it does *not* imply "tlb->end" having that value. tlb->end is initialized to zero (not obvious, but it's what the call to __tlb_reset_range() does). It's then updated by __tlb_adjust_range() as we actually flush individual pages. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/