Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: use the right flag for get_vm_area() percpu, sparc64: fix sparse possible cpu map handling init: set nr_cpu_ids before setup_per_cpu_areas()
This commit is contained in:
Linus Torvalds
commit
77f312a96d
4 changed files with 29 additions and 26 deletions
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@ -1499,7 +1499,7 @@ void __init setup_per_cpu_areas(void)
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dyn_size = pcpur_size - static_size - PERCPU_MODULE_RESERVE;
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ptrs_size = PFN_ALIGN(num_possible_cpus() * sizeof(pcpur_ptrs[0]));
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ptrs_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpur_ptrs[0]));
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pcpur_ptrs = alloc_bootmem(ptrs_size);
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for_each_possible_cpu(cpu) {
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@ -1514,7 +1514,7 @@ void __init setup_per_cpu_areas(void)
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/* allocate address and map */
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vm.flags = VM_ALLOC;
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vm.size = num_possible_cpus() * PCPU_CHUNK_SIZE;
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vm.size = nr_cpu_ids * PCPU_CHUNK_SIZE;
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vm_area_register_early(&vm, PCPU_CHUNK_SIZE);
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for_each_possible_cpu(cpu) {
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@ -165,7 +165,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
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if (!chosen) {
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size_t vm_size = VMALLOC_END - VMALLOC_START;
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size_t tot_size = num_possible_cpus() * PMD_SIZE;
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size_t tot_size = nr_cpu_ids * PMD_SIZE;
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/* on non-NUMA, embedding is better */
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if (!pcpu_need_numa())
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@ -199,7 +199,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
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dyn_size = pcpul_size - static_size - PERCPU_FIRST_CHUNK_RESERVE;
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/* allocate pointer array and alloc large pages */
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map_size = PFN_ALIGN(num_possible_cpus() * sizeof(pcpul_map[0]));
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map_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpul_map[0]));
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pcpul_map = alloc_bootmem(map_size);
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for_each_possible_cpu(cpu) {
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@ -228,7 +228,7 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
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/* allocate address and map */
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pcpul_vm.flags = VM_ALLOC;
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pcpul_vm.size = num_possible_cpus() * PMD_SIZE;
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pcpul_vm.size = nr_cpu_ids * PMD_SIZE;
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vm_area_register_early(&pcpul_vm, PMD_SIZE);
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for_each_possible_cpu(cpu) {
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@ -250,8 +250,8 @@ static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
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PMD_SIZE, pcpul_vm.addr, NULL);
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/* sort pcpul_map array for pcpu_lpage_remapped() */
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for (i = 0; i < num_possible_cpus() - 1; i++)
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for (j = i + 1; j < num_possible_cpus(); j++)
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for (i = 0; i < nr_cpu_ids - 1; i++)
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for (j = i + 1; j < nr_cpu_ids; j++)
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if (pcpul_map[i].ptr > pcpul_map[j].ptr) {
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struct pcpul_ent tmp = pcpul_map[i];
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pcpul_map[i] = pcpul_map[j];
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@ -288,7 +288,7 @@ void *pcpu_lpage_remapped(void *kaddr)
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{
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void *pmd_addr = (void *)((unsigned long)kaddr & PMD_MASK);
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unsigned long offset = (unsigned long)kaddr & ~PMD_MASK;
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int left = 0, right = num_possible_cpus() - 1;
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int left = 0, right = nr_cpu_ids - 1;
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int pos;
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/* pcpul in use at all? */
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@ -377,7 +377,7 @@ static ssize_t __init setup_pcpu_4k(size_t static_size)
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pcpu4k_nr_static_pages = PFN_UP(static_size);
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/* unaligned allocations can't be freed, round up to page size */
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pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * num_possible_cpus()
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pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * nr_cpu_ids
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* sizeof(pcpu4k_pages[0]));
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pcpu4k_pages = alloc_bootmem(pages_size);
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@ -584,8 +584,8 @@ asmlinkage void __init start_kernel(void)
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setup_arch(&command_line);
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mm_init_owner(&init_mm, &init_task);
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setup_command_line(command_line);
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setup_per_cpu_areas();
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setup_nr_cpu_ids();
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setup_per_cpu_areas();
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smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
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build_all_zonelists();
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35
mm/percpu.c
35
mm/percpu.c
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@ -8,12 +8,12 @@
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*
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* This is percpu allocator which can handle both static and dynamic
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* areas. Percpu areas are allocated in chunks in vmalloc area. Each
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* chunk is consisted of num_possible_cpus() units and the first chunk
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* is used for static percpu variables in the kernel image (special
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* boot time alloc/init handling necessary as these areas need to be
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* brought up before allocation services are running). Unit grows as
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* necessary and all units grow or shrink in unison. When a chunk is
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* filled up, another chunk is allocated. ie. in vmalloc area
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* chunk is consisted of nr_cpu_ids units and the first chunk is used
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* for static percpu variables in the kernel image (special boot time
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* alloc/init handling necessary as these areas need to be brought up
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* before allocation services are running). Unit grows as necessary
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* and all units grow or shrink in unison. When a chunk is filled up,
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* another chunk is allocated. ie. in vmalloc area
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*
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* c0 c1 c2
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* ------------------- ------------------- ------------
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@ -558,7 +558,7 @@ static void pcpu_free_area(struct pcpu_chunk *chunk, int freeme)
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static void pcpu_unmap(struct pcpu_chunk *chunk, int page_start, int page_end,
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bool flush_tlb)
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{
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unsigned int last = num_possible_cpus() - 1;
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unsigned int last = nr_cpu_ids - 1;
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unsigned int cpu;
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/* unmap must not be done on immutable chunk */
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@ -643,7 +643,7 @@ static void pcpu_depopulate_chunk(struct pcpu_chunk *chunk, int off, int size,
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*/
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static int pcpu_map(struct pcpu_chunk *chunk, int page_start, int page_end)
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{
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unsigned int last = num_possible_cpus() - 1;
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unsigned int last = nr_cpu_ids - 1;
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unsigned int cpu;
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int err;
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@ -749,7 +749,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void)
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chunk->map[chunk->map_used++] = pcpu_unit_size;
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chunk->page = chunk->page_ar;
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chunk->vm = get_vm_area(pcpu_chunk_size, GFP_KERNEL);
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chunk->vm = get_vm_area(pcpu_chunk_size, VM_ALLOC);
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if (!chunk->vm) {
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free_pcpu_chunk(chunk);
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return NULL;
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@ -1067,9 +1067,9 @@ size_t __init pcpu_setup_first_chunk(pcpu_get_page_fn_t get_page_fn,
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PFN_UP(size_sum));
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pcpu_unit_size = pcpu_unit_pages << PAGE_SHIFT;
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pcpu_chunk_size = num_possible_cpus() * pcpu_unit_size;
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pcpu_chunk_size = nr_cpu_ids * pcpu_unit_size;
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pcpu_chunk_struct_size = sizeof(struct pcpu_chunk)
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+ num_possible_cpus() * pcpu_unit_pages * sizeof(struct page *);
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+ nr_cpu_ids * pcpu_unit_pages * sizeof(struct page *);
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if (dyn_size < 0)
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dyn_size = pcpu_unit_size - static_size - reserved_size;
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@ -1248,7 +1248,7 @@ ssize_t __init pcpu_embed_first_chunk(size_t static_size, size_t reserved_size,
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} else
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pcpue_unit_size = max_t(size_t, pcpue_size, PCPU_MIN_UNIT_SIZE);
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chunk_size = pcpue_unit_size * num_possible_cpus();
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chunk_size = pcpue_unit_size * nr_cpu_ids;
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pcpue_ptr = __alloc_bootmem_nopanic(chunk_size, PAGE_SIZE,
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__pa(MAX_DMA_ADDRESS));
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@ -1259,12 +1259,15 @@ ssize_t __init pcpu_embed_first_chunk(size_t static_size, size_t reserved_size,
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}
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/* return the leftover and copy */
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for_each_possible_cpu(cpu) {
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for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
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void *ptr = pcpue_ptr + cpu * pcpue_unit_size;
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free_bootmem(__pa(ptr + pcpue_size),
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pcpue_unit_size - pcpue_size);
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memcpy(ptr, __per_cpu_load, static_size);
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if (cpu_possible(cpu)) {
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free_bootmem(__pa(ptr + pcpue_size),
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pcpue_unit_size - pcpue_size);
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memcpy(ptr, __per_cpu_load, static_size);
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} else
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free_bootmem(__pa(ptr), pcpue_unit_size);
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}
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/* we're ready, commit */
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