lkml.org 
[lkml]   [2014]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 2/3] CMA: aggressively allocate the pages on cma reserved memory when not used
I'm not sure what I'm doing wrong.
These are my code.

770 #ifdef CONFIG_CMA
771 void adjust_managed_cma_page_count(struct zone *zone, long count)
772 {
773 unsigned long flags;
774 long total, cma, movable;
775
776 spin_lock_irqsave(&zone->lock, flags);
777
778 zone->managed_cma_pages += count;
779
780 total = zone->managed_pages;
781 cma = zone->managed_cma_pages;
782 movable = total - cma - high_wmark_pages(zone);
783
784 printk("count=%ld total=%ld cma=%ld movable=%ld\n",
785 count, total, cma, movable);
786


2014-06-02 오후 3:23, Joonsoo Kim 쓴 글:
> 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.
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-06-02 10:21    [W:0.034 / U:0.952 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site