On Tue, Sep 01, 2020 at 06:25:12PM +0100, Al Viro wrote: > On Tue, Sep 01, 2020 at 07:13:00PM +0200, Christophe Leroy wrote: > > > 10.92% dd [kernel.kallsyms] [k] iov_iter_zero > > Interesting... Could you get an instruction-level profile inside > iov_iter_zero(), > along with the disassembly of that sucker?
So the interesting thing here is with that none of these code paths should have changed at all, and the biggest items on the profile look the same modulo some minor reordering.
