Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users

David Hildenbrand
2021-02-08T13:41:26Z

On 08.02.21 13:17, Michal Hocko wrote:
> On Mon 08-02-21 12:26:31, David Hildenbrand wrote:
> [...]
>> My F33 system happily hibernates to disk, even with an application that
>> succeeded in din doing an mlockall().
>>
>> And it somewhat makes sense. Even my freshly-booted, idle F33 has
>>
>> $ cat /proc/meminfo | grep lock
>> Mlocked: 4860 kB
>>
>> So, stopping to hibernate with mlocked memory would essentially prohibit any
>> modern Linux distro to hibernate ever.
>
> My system seems to be completely fine without mlocked memory. It would
> be interesting to see who mlocks memory on your system and check whether
> the expectated mlock semantic really works for those. This should be
> documented at least.

I checked some other installations (Ubuntu, RHEL), and they also show no
sign of Mlock. My notebook (F33) and desktop (F33) both have mlocked
memory. Either related to F33 or due to some software (e.g., kerberos).

--
Thanks,

David / dhildenb