Re: [PATCH] page_alloc: consider highatomic reserve in wmartermark fast

[Mel Gorman]

On Thu, Jun 11, 2020 at 10:43:20AM +0900, Jaewon Kim wrote:
> > That's fine, I simply wanted to illustrate where I thought the check
> > should go to minimise the impact to the majority of allocations.
> Hello Mel.
> Can I understand that you also agrees on checking highatomic reserved?
> 

Yes, I think it should be ok.

> Additionally I've wondered why the number of  highatomic free pages is not
> accurately counted like cma free. Is there any concern on counting it?

At the time, the cost of tracking it with 100% accuracy was not worth
it due to a reliance on the pageblock types to protect the regions from
other allocation types.

-- 
Mel Gorman
SUSE Labs