Re: 4.9.0 regression in pipe-backed iov_iter with systemd-nspawn

[Al Viro]

On Thu, Jan 12, 2017 at 03:28:32PM -0800, Linus Torvalds wrote:
> On Thu, Jan 12, 2017 at 2:46 PM, Alan J. Wylie <alan@xxxxxxxxxxx> wrote:
> >
> > I'm off to bed now with a stinking head cold I'm afraid.
> 
> So assuming Al hasn't figured it out by the time you get back, can you
> try to send us the same strace for the working case?

That, and check if it is reproducible on commit 523ac9afc73a with
commit 8e54cadab447 cherry-picked on top of that.