[PATCH V2 1/2] mm/page_alloc: Replace set_dma_reserve to set_memory_reserve

Srikar Dronamraju srikar at linux.vnet.ibm.com
Fri Aug 5 17:36:21 AEST 2016

* Mel Gorman <mgorman at techsingularity.net> [2016-08-05 07:47:47]:

> On Thu, Aug 04, 2016 at 10:42:08PM +0530, Srikar Dronamraju wrote:
> > Expand the scope of the existing dma_reserve to accommodate other memory
> > reserves too. Accordingly rename variable dma_reserve to
> > nr_memory_reserve.
> > 
> > set_memory_reserve also takes a new parameter that helps to identify if
> > the current value needs to be incremented.
> > 
> I think the parameter is ugly and it should have been just
> inc_memory_reserve but at least it works.

Yes while the parameter is definitely ugly, the only other use
case in arch/x86/kernel/e820.c seems to be written with an intention to
set to an absolute value.

It was "set_dma_reserve(nr_pages - nr_free_pages)". Both of them
nr_pages and nr_free_pages are calculated after walking through the mem
blocks. I didnt want to take a chance where someother code path also
starts to set reserve value and then the code in e820.c just increments

However if you still feel strongly about using inc_memory_reserve than
set_memory_reserve, I will respin.

Thanks and Regards
Srikar Dronamraju

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