Re: [PATCH v2] mm, proc: Fix region lost in /proc/self/smaps

From: Oleg Nesterov
Date: Tue Sep 13 2016 - 11:00:01 EST

On 09/12, Michal Hocko wrote:
> Considering how this all can be tricky and how partial reads can be
> confusing and even misleading I am really wondering whether we
> should simply document that only full reads will provide a sensible
> results.

I agree. I don't even understand why this was considered as a bug.
Obviously, m_stop() which drops mmap_sep should not be called, or
all the threads should be stopped, if you want to trust the result.

Although all I can recall about this code is that it needs more cleanups.