[PATCH RFC 2/4] mm: percpu: Add pcpu_fc_cpu_to_node_fn_t typedef
Kefeng Wang
wangkefeng.wang at huawei.com
Sun Nov 21 01:35:55 PST 2021
Add pcpu_fc_cpu_to_node_fn_t and pass it into pcpu_fc_alloc_fn_t,
pcpu first chunk allocation will call it to alloc memblock on the
corresponding node by it.
Signed-off-by: Kefeng Wang <wangkefeng.wang at huawei.com>
---
arch/mips/mm/init.c | 12 +++++++++---
arch/powerpc/kernel/setup_64.c | 14 +++++++++++---
arch/sparc/kernel/smp_64.c | 8 +++++---
arch/x86/kernel/setup_percpu.c | 18 +++++++++++++-----
drivers/base/arch_numa.c | 8 +++++---
include/linux/percpu.h | 7 +++++--
mm/percpu.c | 14 +++++++++-----
7 files changed, 57 insertions(+), 24 deletions(-)
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 325e1552cbea..ebbf6923532c 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -519,12 +519,17 @@ static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
return node_distance(cpu_to_node(from), cpu_to_node(to));
}
-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
- size_t align)
+static int __init pcpu_cpu_to_node(int cpu)
+{
+ return cpu_to_node(cpu);
+}
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
return memblock_alloc_try_nid(size, align, __pa(MAX_DMA_ADDRESS),
MEMBLOCK_ALLOC_ACCESSIBLE,
- cpu_to_node(cpu));
+ cpu_to_nd_fun(cpu));
}
static void __init pcpu_fc_free(void *ptr, size_t size)
@@ -545,6 +550,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
pcpu_cpu_distance,
+ pcpu_cpu_to_node,
pcpu_fc_alloc, pcpu_fc_free);
if (rc < 0)
panic("Failed to initialize percpu areas.");
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 6052f5d5ded3..9a5609c821df 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -771,6 +771,12 @@ void __init emergency_stack_init(void)
}
#ifdef CONFIG_SMP
+
+static __init int pcpu_cpu_to_node(int cpu)
+{
+ return IS_ENABLED(CONFIG_NUMA) ? early_cpu_to_node(cpu) : NUMA_NO_NODE;
+}
+
/**
* pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
* @cpu: cpu to allocate for
@@ -784,12 +790,12 @@ void __init emergency_stack_init(void)
* RETURNS:
* Pointer to the allocated area on success, NULL on failure.
*/
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size,
- size_t align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
const unsigned long goal = __pa(MAX_DMA_ADDRESS);
#ifdef CONFIG_NUMA
- int node = early_cpu_to_node(cpu);
+ int node = cpu_to_nd_fun(cpu);
void *ptr;
if (!node_online(node) || !NODE_DATA(node)) {
@@ -891,6 +897,7 @@ void __init setup_per_cpu_areas(void)
if (pcpu_chosen_fc != PCPU_FC_PAGE) {
rc = pcpu_embed_first_chunk(0, dyn_size, atom_size, pcpu_cpu_distance,
+ pcpu_cpu_to_node,
pcpu_alloc_bootmem, pcpu_free_bootmem);
if (rc)
pr_warn("PERCPU: %s allocator failed (%d), "
@@ -900,6 +907,7 @@ void __init setup_per_cpu_areas(void)
if (rc < 0)
rc = pcpu_page_first_chunk(0, pcpu_alloc_bootmem, pcpu_free_bootmem,
+ pcpu_cpu_to_node,
pcpu_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index b98a7bbe6728..026aa3ccbc30 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1539,12 +1539,12 @@ void smp_send_stop(void)
* RETURNS:
* Pointer to the allocated area on success, NULL on failure.
*/
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size,
- size_t align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
const unsigned long goal = __pa(MAX_DMA_ADDRESS);
#ifdef CONFIG_NUMA
- int node = cpu_to_node(cpu);
+ int node = cpu_to_nd_fn(cpu);
void *ptr;
if (!node_online(node) || !NODE_DATA(node)) {
@@ -1641,6 +1641,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, 4 << 20,
pcpu_cpu_distance,
+ cpu_to_node,
pcpu_alloc_bootmem,
pcpu_free_bootmem);
if (rc)
@@ -1652,6 +1653,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE,
pcpu_alloc_bootmem,
pcpu_free_bootmem,
+ cpu_to_node,
pcpu_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 7b65275544b2..bba4fa174a16 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -97,12 +97,12 @@ static bool __init pcpu_need_numa(void)
* RETURNS:
* Pointer to the allocated area on success, NULL on failure.
*/
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
- unsigned long align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size, unsigned long align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
const unsigned long goal = __pa(MAX_DMA_ADDRESS);
#ifdef CONFIG_NUMA
- int node = early_cpu_to_node(cpu);
+ int node = cpu_to_nd_fn(cpu);
void *ptr;
if (!node_online(node) || !NODE_DATA(node)) {
@@ -128,9 +128,10 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
/*
* Helpers for first chunk memory allocation
*/
-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
- return pcpu_alloc_bootmem(cpu, size, align);
+ return pcpu_alloc_bootmem(cpu, size, align, cpu_to_nd_fn);
}
static void __init pcpu_fc_free(void *ptr, size_t size)
@@ -150,6 +151,11 @@ static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
#endif
}
+static int __init pcpu_cpu_to_node(int cpu)
+{
+ return IS_ENABLED(CONFIG_NUMA) ? early_cpu_to_node(cpu) : NUMA_NO_NODE;
+}
+
static void __init pcpup_populate_pte(unsigned long addr)
{
populate_extra_pte(addr);
@@ -205,6 +211,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
dyn_size, atom_size,
pcpu_cpu_distance,
+ pcpu_cpu_to_node,
pcpu_fc_alloc, pcpu_fc_free);
if (rc < 0)
pr_warn("%s allocator failed (%d), falling back to page size\n",
@@ -213,6 +220,7 @@ void __init setup_per_cpu_areas(void)
if (rc < 0)
rc = pcpu_page_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
pcpu_fc_alloc, pcpu_fc_free,
+ pcpu_cpu_to_node,
pcpup_populate_pte);
if (rc < 0)
panic("cannot initialize percpu area (err=%d)", rc);
diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c
index bc1876915457..273543d9ff85 100644
--- a/drivers/base/arch_numa.c
+++ b/drivers/base/arch_numa.c
@@ -155,10 +155,10 @@ static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
return node_distance(early_cpu_to_node(from), early_cpu_to_node(to));
}
-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
- size_t align)
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
- int nid = early_cpu_to_node(cpu);
+ int nid = cpu_to_nd_fn(cpu);
return memblock_alloc_try_nid(size, align,
__pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
@@ -229,6 +229,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
pcpu_cpu_distance,
+ early_cpu_to_node,
pcpu_fc_alloc, pcpu_fc_free);
#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
if (rc < 0)
@@ -242,6 +243,7 @@ void __init setup_per_cpu_areas(void)
rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE,
pcpu_fc_alloc,
pcpu_fc_free,
+ early_cpu_to_node,
pcpu_populate_pte);
#endif
if (rc < 0)
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index ae4004e7957e..41bb54715b0c 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -94,8 +94,9 @@ extern const char * const pcpu_fc_names[PCPU_FC_NR];
extern enum pcpu_fc pcpu_chosen_fc;
-typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size,
- size_t align);
+typedef int (pcpu_fc_cpu_to_node_fn_t)(int cpu);
+typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn);
typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);
@@ -111,6 +112,7 @@ extern void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
size_t atom_size,
pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
pcpu_fc_alloc_fn_t alloc_fn,
pcpu_fc_free_fn_t free_fn);
#endif
@@ -119,6 +121,7 @@ extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
extern int __init pcpu_page_first_chunk(size_t reserved_size,
pcpu_fc_alloc_fn_t alloc_fn,
pcpu_fc_free_fn_t free_fn,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
pcpu_fc_populate_pte_fn_t populate_pte_fn);
#endif
diff --git a/mm/percpu.c b/mm/percpu.c
index f5b2c2ea5a54..3f6cf1ff0be2 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -3001,6 +3001,7 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(
* @dyn_size: minimum free size for dynamic allocation in bytes
* @atom_size: allocation atom size
* @cpu_distance_fn: callback to determine distance between cpus, optional
+ * @cpu_to_nd_fn: callback to convert cpu to it's node, optional
* @alloc_fn: function to allocate percpu page
* @free_fn: function to free percpu page
*
@@ -3030,6 +3031,7 @@ static struct pcpu_alloc_info * __init __flatten pcpu_build_alloc_info(
int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
size_t atom_size,
pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
pcpu_fc_alloc_fn_t alloc_fn,
pcpu_fc_free_fn_t free_fn)
{
@@ -3066,7 +3068,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
BUG_ON(cpu == NR_CPUS);
/* allocate space for the whole group */
- ptr = alloc_fn(cpu, gi->nr_units * ai->unit_size, atom_size);
+ ptr = alloc_fn(cpu, gi->nr_units * ai->unit_size, atom_size, cpu_to_nd_fn);
if (!ptr) {
rc = -ENOMEM;
goto out_free_areas;
@@ -3145,6 +3147,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
* @reserved_size: the size of reserved percpu area in bytes
* @alloc_fn: function to allocate percpu page, always called with PAGE_SIZE
* @free_fn: function to free percpu page, always called with PAGE_SIZE
+ * @cpu_to_nd_fn: callback to convert cpu to it's node, optional
* @populate_pte_fn: function to populate pte
*
* This is a helper to ease setting up page-remapped first percpu
@@ -3159,6 +3162,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
int __init pcpu_page_first_chunk(size_t reserved_size,
pcpu_fc_alloc_fn_t alloc_fn,
pcpu_fc_free_fn_t free_fn,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn,
pcpu_fc_populate_pte_fn_t populate_pte_fn)
{
static struct vm_struct vm;
@@ -3201,7 +3205,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
for (i = 0; i < unit_pages; i++) {
void *ptr;
- ptr = alloc_fn(cpu, PAGE_SIZE, PAGE_SIZE);
+ ptr = alloc_fn(cpu, PAGE_SIZE, PAGE_SIZE, cpu_to_nd_fn);
if (!ptr) {
pr_warn("failed to allocate %s page for cpu%u\n",
psize_str, cpu);
@@ -3278,8 +3282,8 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
-static void * __init pcpu_dfl_fc_alloc(unsigned int cpu, size_t size,
- size_t align)
+static void * __init pcpu_dfl_fc_alloc(unsigned int cpu, size_t size, size_t align,
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn)
{
return memblock_alloc_from(size, align, __pa(MAX_DMA_ADDRESS));
}
@@ -3300,7 +3304,7 @@ void __init setup_per_cpu_areas(void)
* what the legacy allocator did.
*/
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
- PERCPU_DYNAMIC_RESERVE, PAGE_SIZE, NULL,
+ PERCPU_DYNAMIC_RESERVE, PAGE_SIZE, NULL, NULL,
pcpu_dfl_fc_alloc, pcpu_dfl_fc_free);
if (rc < 0)
panic("Failed to initialize percpu areas.");
--
2.26.2
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