2014-08-06 23:05:25 +00:00
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#ifndef __CMA_H__
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#define __CMA_H__
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/*
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* There is always at least global CMA area and a few optional
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* areas configured in kernel .config.
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*/
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#ifdef CONFIG_CMA_AREAS
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#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
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#else
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#define MAX_CMA_AREAS (0)
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#endif
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struct cma;
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mm: cma: split cma-reserved in dmesg log
When the system boots up, in the dmesg logs we can see the memory
statistics along with total reserved as below. Memory: 458840k/458840k
available, 65448k reserved, 0K highmem
When CMA is enabled, still the total reserved memory remains the same.
However, the CMA memory is not considered as reserved. But, when we see
/proc/meminfo, the CMA memory is part of free memory. This creates
confusion. This patch corrects the problem by properly subtracting the
CMA reserved memory from the total reserved memory in dmesg logs.
Below is the dmesg snapshot from an arm based device with 512MB RAM and
12MB single CMA region.
Before this change:
Memory: 458840k/458840k available, 65448k reserved, 0K highmem
After this change:
Memory: 458840k/458840k available, 53160k reserved, 12288k cma-reserved, 0K highmem
Signed-off-by: Pintu Kumar <pintu.k@samsung.com>
Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-19 00:17:15 +00:00
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extern unsigned long totalcma_pages;
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2015-04-14 22:47:04 +00:00
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extern phys_addr_t cma_get_base(const struct cma *cma);
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extern unsigned long cma_get_size(const struct cma *cma);
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2014-08-06 23:05:25 +00:00
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2014-10-24 09:47:57 +00:00
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extern int __init cma_declare_contiguous(phys_addr_t base,
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phys_addr_t size, phys_addr_t limit,
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2014-08-06 23:05:25 +00:00
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phys_addr_t alignment, unsigned int order_per_bit,
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2014-08-06 23:05:32 +00:00
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bool fixed, struct cma **res_cma);
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2015-04-14 22:47:04 +00:00
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extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
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unsigned int order_per_bit,
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2014-10-13 22:51:09 +00:00
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struct cma **res_cma);
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2015-10-22 20:32:11 +00:00
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extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align);
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2015-04-14 22:47:04 +00:00
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extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
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2014-08-06 23:05:25 +00:00
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#endif
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