diff options
| -rw-r--r-- | arch/ia64/kernel/vmlinux.lds.S | 11 | ||||
| -rw-r--r-- | arch/ia64/mm/contig.c | 41 | ||||
| -rw-r--r-- | arch/ia64/mm/discontig.c | 35 |
3 files changed, 57 insertions, 30 deletions
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S index 0a0c77b..1295ba3 100644 --- a/arch/ia64/kernel/vmlinux.lds.S +++ b/arch/ia64/kernel/vmlinux.lds.S @@ -166,6 +166,12 @@ SECTIONS } #endif +#ifdef CONFIG_SMP + . = ALIGN(PERCPU_PAGE_SIZE); + __cpu0_per_cpu = .; + . = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */ +#endif + . = ALIGN(PAGE_SIZE); __init_end = .; @@ -198,11 +204,6 @@ SECTIONS data : { } :data .data : AT(ADDR(.data) - LOAD_OFFSET) { -#ifdef CONFIG_SMP - . = ALIGN(PERCPU_PAGE_SIZE); - __cpu0_per_cpu = .; - . = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */ -#endif INIT_TASK_DATA(PAGE_SIZE) CACHELINE_ALIGNED_DATA(SMP_CACHE_BYTES) READ_MOSTLY_DATA(SMP_CACHE_BYTES) diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c index 1341437..351da0a 100644 --- a/arch/ia64/mm/contig.c +++ b/arch/ia64/mm/contig.c @@ -154,36 +154,49 @@ static void *cpu_data; void * __cpuinit per_cpu_init (void) { - int cpu; - static int first_time=1; + static bool first_time = true; + void *cpu0_data = __cpu0_per_cpu; + unsigned int cpu; + + if (!first_time) + goto skip; + first_time = false; /* * get_free_pages() cannot be used before cpu_init() done. BSP * allocates "NR_CPUS" pages for all CPUs to avoid that AP calls * get_zeroed_page(). */ - if (first_time) { - void *cpu0_data = __cpu0_per_cpu; + for (cpu = 0; cpu < NR_CPUS; cpu++) { + void *src = cpu == 0 ? cpu0_data : __phys_per_cpu_start; - first_time=0; + memcpy(cpu_data, src, __per_cpu_end - __per_cpu_start); + __per_cpu_offset[cpu] = (char *)cpu_data - __per_cpu_start; + per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; - __per_cpu_offset[0] = (char *) cpu0_data - __per_cpu_start; - per_cpu(local_per_cpu_offset, 0) = __per_cpu_offset[0]; + /* + * percpu area for cpu0 is moved from the __init area + * which is setup by head.S and used till this point. + * Update ar.k3. This move is ensures that percpu + * area for cpu0 is on the correct node and its + * virtual address isn't insanely far from other + * percpu areas which is important for congruent + * percpu allocator. + */ + if (cpu == 0) + ia64_set_kr(IA64_KR_PER_CPU_DATA, __pa(cpu_data) - + (unsigned long)__per_cpu_start); - for (cpu = 1; cpu < NR_CPUS; cpu++) { - memcpy(cpu_data, __phys_per_cpu_start, __per_cpu_end - __per_cpu_start); - __per_cpu_offset[cpu] = (char *) cpu_data - __per_cpu_start; - cpu_data += PERCPU_PAGE_SIZE; - per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; - } + cpu_data += PERCPU_PAGE_SIZE; } +skip: return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; } static inline void alloc_per_cpu_data(void) { - cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * NR_CPUS-1, + cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * NR_CPUS, PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); } #else diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 9f24b3c..200282b 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -143,17 +143,30 @@ static void *per_cpu_node_setup(void *cpu_data, int node) int cpu; for_each_possible_early_cpu(cpu) { - if (cpu == 0) { - void *cpu0_data = __cpu0_per_cpu; - __per_cpu_offset[cpu] = (char*)cpu0_data - - __per_cpu_start; - } else if (node == node_cpuid[cpu].nid) { - memcpy(__va(cpu_data), __phys_per_cpu_start, - __per_cpu_end - __per_cpu_start); - __per_cpu_offset[cpu] = (char*)__va(cpu_data) - - __per_cpu_start; - cpu_data += PERCPU_PAGE_SIZE; - } + void *src = cpu == 0 ? __cpu0_per_cpu : __phys_per_cpu_start; + + if (node != node_cpuid[cpu].nid) + continue; + + memcpy(__va(cpu_data), src, __per_cpu_end - __per_cpu_start); + __per_cpu_offset[cpu] = (char *)__va(cpu_data) - + __per_cpu_start; + + /* + * percpu area for cpu0 is moved from the __init area + * which is setup by head.S and used till this point. + * Update ar.k3. This move is ensures that percpu + * area for cpu0 is on the correct node and its + * virtual address isn't insanely far from other + * percpu areas which is important for congruent + * percpu allocator. + */ + if (cpu == 0) + ia64_set_kr(IA64_KR_PER_CPU_DATA, + (unsigned long)cpu_data - + (unsigned long)__per_cpu_start); + + cpu_data += PERCPU_PAGE_SIZE; } #endif return cpu_data; |