On 01/10/15 20:56, Linus Torvalds wrote: > 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.
Ooops! :) > 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. Thanks. Laszlo -- 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/
