Re: [PATCHv5] mm: skip CMA pages when they are not available

[Andrew Morton]

On Mon, 12 Jun 2023 12:01:20 +0200 David Hildenbrand <david@xxxxxxxxxx> wrote:

> ...
>
> >>
> >> If it's a performance improvement, it would be good to show that it is
> >> an actual improvement worth the churn ...
> > Sorry for the confusion. As for the OOM issue, the previous
> > commit(https://lkml.kernel.org/r/1683782550-25799-1-git-send-email-zhaoyang.huang@xxxxxxxxxx)
> > helps to decrease the fail rate from 12/20 to 2/20, which it turn to
> > be 0 when applying this patch.
> 
> Thanks! Can we make that clearer in the patch description? I'm 
> struggling a bit my self to find the right words.
> 
> Something like
> 
> "This change further decreases the chance for wrong OOMs in the presence 
> of a lot of CMA memory."
> 

Great, I added that.

> 
> In any case
> 
> Acked-by: David Hildenbrand <david@xxxxxxxxxx>
> 

And I'll move this patch into mm-stable.