On Wed 19-10-16 10:23:55, Dave Hansen wrote:

On 10/19/2016 10:01 AM, Michal Hocko wrote:

quoted

The question I had earlier was whether this has to be an explicit FOLL
flag used by g-u-p users or we can just use it internally when mm !=
current->mm

The reason I chose not to do that was that deferred work gets run under
a basically random 'current'.  If we just use 'mm != current->mm', then
the deferred work will sometimes have pkeys enforced and sometimes not,
basically randomly.

OK, I see (async_pf_execute and ksm ). It makes more sense to me. Thanks
for the clarification.

-- 
Michal Hocko
SUSE Labs