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authorRavikiran G Thirumalai <kiran@scalex86.org>2006-01-11 22:45:42 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-11 19:04:59 -0800
commit365ba9179f84244d2ffa98e46ae3cddfeb2ef6ff (patch)
treeb84be7f9f929d8084fa76af2618877439baee841
parentdf79efde82952edc653fa6eb1338a82b87aa0585 (diff)
[PATCH] x86_64: Allocate PDAs in the local node
Patch uses a static PDA array early at boot and reallocates processor PDA with node local memory when kmalloc is ready, just before pda_init. The boot_cpu_pda is needed since the cpu_pda is used even before pda_init for that cpu is called (to set the static per-cpu areas offset table etc) Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/x86_64/kernel/head64.c3
-rw-r--r--arch/x86_64/kernel/setup64.c3
-rw-r--r--arch/x86_64/kernel/smpboot.c17
-rw-r--r--include/asm-x86_64/pda.h5
4 files changed, 25 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index b675c5add01..2ea42ceb08f 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -92,6 +92,9 @@ void __init x86_64_start_kernel(char * real_mode_data)
memcpy(init_level4_pgt, boot_level4_pgt, PTRS_PER_PGD*sizeof(pgd_t));
asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
+ for (i = 0; i < NR_CPUS; i++)
+ cpu_pda(i) = &boot_cpu_pda[i];
+
pda_init(0);
copy_bootdata(real_mode_data);
#ifdef CONFIG_SMP
diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index 66325a79ed5..6eff51e9400 100644
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -30,7 +30,8 @@ char x86_boot_params[BOOT_PARAM_SIZE] __initdata = {0,};
cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
-struct x8664_pda _cpu_pda[NR_CPUS] __cacheline_aligned;
+struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly;
+struct x8664_pda boot_cpu_pda[NR_CPUS] __cacheline_aligned;
struct desc_ptr idt_descr = { 256 * 16, (unsigned long) idt_table };
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 4884ca12444..c8169d066cb 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -757,6 +757,23 @@ static int __cpuinit do_boot_cpu(int cpu, int apicid)
return -1;
}
+ /* Allocate node local memory for AP pdas */
+ if (cpu_pda(cpu) == &boot_cpu_pda[cpu]) {
+ struct x8664_pda *newpda, *pda;
+ int node = cpu_to_node(cpu);
+ pda = cpu_pda(cpu);
+ newpda = kmalloc_node(sizeof (struct x8664_pda), GFP_ATOMIC,
+ node);
+ if (newpda) {
+ memcpy(newpda, pda, sizeof (struct x8664_pda));
+ cpu_pda(cpu) = newpda;
+ } else
+ printk(KERN_ERR
+ "Could not allocate node local PDA for CPU %d on node %d\n",
+ cpu, node);
+ }
+
+
c_idle.idle = get_idle_for_cpu(cpu);
if (c_idle.idle) {
diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index dc33d28a72d..c7ab38a601a 100644
--- a/include/asm-x86_64/pda.h
+++ b/include/asm-x86_64/pda.h
@@ -27,9 +27,10 @@ struct x8664_pda {
unsigned apic_timer_irqs;
} ____cacheline_aligned_in_smp;
-extern struct x8664_pda _cpu_pda[];
+extern struct x8664_pda *_cpu_pda[];
+extern struct x8664_pda boot_cpu_pda[];
-#define cpu_pda(i) (&_cpu_pda[i])
+#define cpu_pda(i) (_cpu_pda[i])
/*
* There is no fast way to get the base address of the PDA, all the accesses