Re: [v4 PATCH] mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct

[Michal Hocko]

On Wed 18-04-18 12:02:17, Cyrill Gorcunov wrote:
> On Wed, Apr 18, 2018 at 10:05:55AM +0200, Michal Hocko wrote:
> > 
> > Yes, looks good to me. As mentioned in other emails prctl_set_mm_map
> > really deserves a comment explaining why we are doing the down_read
> > 
> > What about something like the following?
> > "
> > arg_lock protects concurent updates but we still need mmap_sem for read
> > to exclude races with do_brk.
> > "
> > Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> 
> Yes, thanks! Andrew, could you slightly update the changelog please?

No, I meant it to be a comment in the _code_.

-- 
Michal Hocko
SUSE Labs