Re: [PATCH v2 2/3] CMA: aggressively allocate the pages on cma reserved memory when not used

[Joonsoo Kim]

On Mon, Jun 02, 2014 at 02:54:30PM +0900, Gioh Kim wrote:
> I found 2 problems at my platform.
> 
> 1st is occured when I set CMA size 528MB and total memory is 960MB.
> I print some values in adjust_managed_cma_page_count(),
> the total value becomes 105439 and cma value 131072.
> Finally movable value becomes negative value.
> 
> The total value 105439 means 411MB.
> Is the zone->managed_pages value pages amount except the CMA?
> I think zone->managed_pages value is including CMA size but it's value is strange.

Hmm...
zone->managed_pages includes nr of CMA pages.
Is there any mistake about your printk?

> 
> 2nd is a kernel panic at __netdev_alloc_skb().
> I'm not sure it is caused by the CMA.
> I'm checking it again and going to send you another report with detail call-stacks.

Okay.

Thanks.

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