Re: [RFC PATCH] mm, oom: allow oom reaper to race with exit_mmap

[Tetsuo Handa]

Michal Hocko wrote:
> > I wonder why you prefer timeout based approach. Your patch will after all
> > set MMF_OOM_SKIP if operations between down_write() and up_write() took
> > more than one second.
> 
> if we reach down_write then we have unmapped the address space in
> exit_mmap and oom reaper cannot do much more.

So, by the time down_write() is called, majority of memory is already released, isn't it?