Re: [PATCH v6 0/6] ksm: support tracking KSM-placed zero-pages

[David Hildenbrand]

On 29.03.23 00:38, Andrew Morton wrote:
> On Fri, 10 Feb 2023 09:15:22 +0800 (CST) <yang.yang29@xxxxxxxxxx> wrote:
>
> > The core idea of this patch set is to enable users to perceive the number of any
> > pages merged by KSM, regardless of whether use_zero_page switch has been turned
> > on, so that users can know how much free memory increase is really due to their
> > madvise(MERGEABLE) actions. But the problem is, when enabling use_zero_pages,
> > all empty pages will be merged with kernel zero pages instead of with each
> > other as use_zero_pages is disabled, and then these zero-pages are no longer
> > monitored by KSM.
>
> We appear to have some outstanding activity on this quite old patchset.
>  From my notes:
>
> - An unresponded-to question from Claudia:
> 	https://lkml.kernel.org/r/20230307192421.30ab869c@p-imbrenda
>
> - Hoping for overall review from David

I already shared some feedback in [1]. I think we should try to simplify 
this handling, as proposed in that mail. Still waiting for a reply.

[1] 
https://lore.kernel.org/all/9d7a8be3-ee9e-3492-841b-a0af9952ef36@xxxxxxxxxx/

--
Thanks,

David / dhildenb