Re: Cgroups support for THP

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On Mon, Dec 17, 2018 at 01:56:40PM +0530, vijay nag wrote:
> Hello Linux-MM,
> 
> My containerized application which is suppose to have a very low RSS(by default
> containers patterns are to have low memory footprint) seems to be getting its
> BSS segment RSS bloated due to THPs. Although there is a huge zero page
> support, the overhead seems to be at-least 2MB even when a byte is dirtied.
> Also there are tune-able to disable this feature,  but this seems to be a
> system wide setting. Is there a plan to make this setting cgroup aware ?

It's possible to control THP on per-mapping using madvise(MADV_NOHUGEPAGE)
and per-process using prctl(PR_SET_THP_DISABLE). 
 
> Thanks,
> Vijay Nag

-- 
Sincerely yours,
Mike.




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