path: root/mm/cma.c
diff options
authorAslan Bakirov <aslan@fb.com>2020-04-10 14:32:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-10 15:36:21 -0700
commit8676af1ff2d28e64e5636147821bda7524cf007d (patch)
tree4c45091c02bf594cad386000819c942c3e8e8270 /mm/cma.c
parent783fda856e1034dee90a873f7654c418212d12d7 (diff)
mm: cma: NUMA node interface
I've noticed that there is no interface exposed by CMA which would let me to declare contigous memory on particular NUMA node. This patchset adds the ability to try to allocate contiguous memory on a specific node. It will fallback to other nodes if the specified one doesn't work. Implement a new method for declaring contigous memory on particular node and keep cma_declare_contiguous() as a wrapper. [akpm@linux-foundation.org: build fix] Signed-off-by: Aslan Bakirov <aslan@fb.com> Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@kernel.org> Cc: Andreas Schaufler <andreas.schaufler@gmx.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Rik van Riel <riel@surriel.com> Cc: Joonsoo Kim <js1304@gmail.com> Link: http://lkml.kernel.org/r/20200407163840.92263-2-guro@fb.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/cma.c')
1 files changed, 9 insertions, 7 deletions
diff --git a/mm/cma.c b/mm/cma.c
index be55d1988c67..0463ad2ce06b 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -220,7 +220,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
- * cma_declare_contiguous() - reserve custom contiguous area
+ * cma_declare_contiguous_nid() - reserve custom contiguous area
* @base: Base address of the reserved area optional, use 0 for any
* @size: Size of the reserved area (in bytes),
* @limit: End address of the reserved memory (optional, 0 for any).
@@ -229,6 +229,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
* @fixed: hint about where to place the reserved area
* @name: The name of the area. See function cma_init_reserved_mem()
* @res_cma: Pointer to store the created cma region.
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
* This function reserves memory from early allocator. It should be
* called by arch specific code once the early allocator (memblock or bootmem)
@@ -238,10 +239,11 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
* If @fixed is true, reserve contiguous area at exactly @base. If false,
* reserve in range from @base to @limit.
-int __init cma_declare_contiguous(phys_addr_t base,
+int __init cma_declare_contiguous_nid(phys_addr_t base,
phys_addr_t size, phys_addr_t limit,
phys_addr_t alignment, unsigned int order_per_bit,
- bool fixed, const char *name, struct cma **res_cma)
+ bool fixed, const char *name, struct cma **res_cma,
+ int nid)
phys_addr_t memblock_end = memblock_end_of_DRAM();
phys_addr_t highmem_start;
@@ -336,14 +338,14 @@ int __init cma_declare_contiguous(phys_addr_t base,
* memory in case of failure.
if (base < highmem_start && limit > highmem_start) {
- addr = memblock_phys_alloc_range(size, alignment,
- highmem_start, limit);
+ addr = memblock_alloc_range_nid(size, alignment,
+ highmem_start, limit, nid, false);
limit = highmem_start;
if (!addr) {
- addr = memblock_phys_alloc_range(size, alignment, base,
- limit);
+ addr = memblock_alloc_range_nid(size, alignment, base,
+ limit, nid, false);
if (!addr) {
ret = -ENOMEM;
goto err;