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

From: Yang Shi
Date: Wed Apr 18 2018 - 14:19:21 EST

On 4/18/18 2:40 AM, Cyrill Gorcunov wrote:
On Wed, Apr 18, 2018 at 11:03:14AM +0200, Michal Hocko wrote:
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_.
Ah, I see. Then small patch on top should do the trick.

Will send out an incremental patch soon.