Am Mittwoch, 27. Juni 2018, 15:12:48 CEST schrieb Michal Hocko: > On Wed 27-06-18 13:29:05, Richard Weinberger wrote: > > On Wed, Jun 27, 2018 at 11:34 AM, Jefferson Carpenter > > <[email protected]> wrote: > > > Is there a way for a user process to mark memory as 'sensitive' or > > > 'non-sensitive' when it is allocated? That could allow it not to have to > > > be > > > zeroed before being allocated to another process. > > > > Isn't this what we have Meltdown and Spectre for? ;-) > > > > No, memory from the kernel is always zeroed. > > libc offers malloc() and calloc() for this purpose. > > Well, except for the weird MAP_UNINITIALIZED. Anyway agreed that this is > a bad idea and the flag should have never been merged. I've just > mentioned it for completness.
Oh, I forgot about the crazy nommu world. :-) Thanks, //richard -- sigma star gmbh - Eduard-Bodem-Gasse 6 - 6020 Innsbruck - Austria ATU66964118 - FN 374287y
