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x86-64: Move nodenumber from PDA to per-cpu.

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tj: * s/nodenumber/node_number/
    * removed now unused pda variable from pda_init()

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Brian Gerst 2009-01-19 00:38:59 +09:00 committed by Tejun Heo
parent 5689553076
commit e7a22c1ebc
4 changed files with 11 additions and 10 deletions
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1
arch/x86/include/asm/pda.h
View File

@ -22,7 +22,6 @@ struct x8664_pda {
/* gcc-ABI: this canary MUST be at
offset 40!!! */
#endif
short nodenumber; /* number of current node (32k max) */
short in_bootmem; /* pda lives in bootmem */
short isidle;
} ____cacheline_aligned_in_smp;

3
arch/x86/include/asm/topology.h
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@ -83,7 +83,8 @@ extern cpumask_t *node_to_cpumask_map;
DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
/* Returns the number of the current Node. */
#define numa_node_id() read_pda(nodenumber)
DECLARE_PER_CPU(int, node_number);
#define numa_node_id() percpu_read(node_number)
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
extern int cpu_to_node(int cpu);

13
arch/x86/kernel/cpu/common.c
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@ -897,18 +897,11 @@ DEFINE_PER_CPU(unsigned int, irq_count) = -1;
void __cpuinit pda_init(int cpu)
{
struct x8664_pda *pda = cpu_pda(cpu);
/* Setup up data that may be needed in __get_free_pages early */
loadsegment(fs, 0);
loadsegment(gs, 0);
load_pda_offset(cpu);
if (cpu != 0) {
if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
pda->nodenumber = cpu_to_node(cpu);
}
}
static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
@ -978,6 +971,12 @@ void __cpuinit cpu_init(void)
if (cpu != 0)
pda_init(cpu);
#ifdef CONFIG_NUMA
if (cpu != 0 && percpu_read(node_number) == 0 &&
cpu_to_node(cpu) != NUMA_NO_NODE)
percpu_write(node_number, cpu_to_node(cpu));
#endif
me = current;
if (cpumask_test_and_set_cpu(cpu, cpu_initialized_mask))

4
arch/x86/kernel/setup_percpu.c
View File

@ -53,6 +53,8 @@ EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
#define X86_64_NUMA 1 /* (used later) */
DEFINE_PER_CPU(int, node_number) = 0;
EXPORT_PER_CPU_SYMBOL(node_number);
/*
* Map cpu index to node index
@ -283,7 +285,7 @@ void __cpuinit numa_set_node(int cpu, int node)
per_cpu(x86_cpu_to_node_map, cpu) = node;
if (node != NUMA_NO_NODE)
cpu_pda(cpu)->nodenumber = node;
per_cpu(node_number, cpu) = node;
}
void __cpuinit numa_clear_node(int cpu)