On Sun, Mar 10, 2019 at 5:41 PM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> A couple of iov_iter patches - Christoph's crapectomy (the last
> remaining user of iov_for_each() went away with lustre, IIRC) and Eric'c
> optimization of sanity checks.
I certainly heartily approve of making page_copy_sane() be less insane
than it used to be.
That said - has the warning that it has triggered lately?
If that sanity check still shows up in profiles as a performance
problem, maybe the whole thing could at least be made dependent on
some sanity checking option to get rid of it entirely for the common
case?
Linus
