Re: [patch] mremap.2: Add description of old_size == 0 functionality

[Florian Weimer]

On 09/25/2017 04:52 PM, Michal Hocko wrote:
> On Mon 25-09-17 15:16:09, Florian Weimer wrote:
> > On 09/25/2017 02:52 PM, Michal Hocko wrote:
> > > So, how are you going to deal with the CoW and the implementation which
> > > basically means that the newm mmap content is not the same as the
> > > original one?
> >
> > I don't understand why CoW would kick in.
>
> So you can guarantee nobody is going to write to that memory?

It's mapped readable and executable, but not writable.  So the only 
thing that could interfere would be a debugger.

Thanks,
Florian