Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

Michal Hocko
2018-06-27T11:59:33Z

On Wed 27-06-18 13:53:49, Jan Kara wrote:
> On Wed 27-06-18 13:32:21, Michal Hocko wrote:
[...]
> > Appart from that, do we really care about 32b here? Big DIO, IB users
> > seem to be 64b only AFAIU.
>
> IMO it is a bad habit to leave unpriviledged-user-triggerable oops in the
> kernel even for uncommon platforms...

Absolutely agreed! I didn't mean to keep the blow up for 32b. I just
wanted to say that we can stay with a simple solution for 32b. I thought
the g-u-p-longterm has plugged the most obvious breakage already. But
maybe I just misunderstood.
--
Michal Hocko
SUSE Labs