Re: [PATCH 1/6] seq_file: add seq_read_iter

[Al Viro]

On Fri, Nov 13, 2020 at 11:19:34PM -0700, Nathan Chancellor wrote:

> Assuming so, I have attached the output both with and without the
> WARN_ON. Looks like mountinfo is what is causing the error?

Cute...  FWIW, on #origin + that commit with fix folded in I don't
see anything unusual in reads from mountinfo ;-/  OTOH, they'd
obviously been... creative with readv(2) arguments, so it would
be very interesting to see what it is they are passing to it.

I'm half-asleep right now; will try to cook something to gather
that information tomorrow morning.  'Later...