Re: [PATCH V2] mm: Allow userland to request that the kernel clear memory on release

[Vlastimil Babka]

On 4/25/19 2:14 PM, Michal Hocko wrote:
> Please cc linux-api for user visible API proposals (now done). Keep the
> rest of the email intact for reference.
> 
> On Wed 24-04-19 14:10:39, Matthew Garrett wrote:
>> From: Matthew Garrett <mjg59@xxxxxxxxxx>
>>
>> Applications that hold secrets and wish to avoid them leaking can use
>> mlock() to prevent the page from being pushed out to swap and
>> MADV_DONTDUMP to prevent it from being included in core dumps. Applications

So, do we really need a new madvise() flag and VMA flag, or can we just
infer this page clearing from mlock+MADV_DONTDUMP being both applied?