diff options
| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2006-01-11 22:45:42 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:04:59 -0800 |
| commit | 365ba9179f84244d2ffa98e46ae3cddfeb2ef6ff (patch) | |
| tree | b84be7f9f929d8084fa76af2618877439baee841 | |
| parent | df79efde82952edc653fa6eb1338a82b87aa0585 (diff) | |
| download | blackbird-op-linux-365ba9179f84244d2ffa98e46ae3cddfeb2ef6ff.tar.gz blackbird-op-linux-365ba9179f84244d2ffa98e46ae3cddfeb2ef6ff.zip | |
[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.c | 3 | ||||
| -rw-r--r-- | arch/x86_64/kernel/setup64.c | 3 | ||||
| -rw-r--r-- | arch/x86_64/kernel/smpboot.c | 17 | ||||
| -rw-r--r-- | include/asm-x86_64/pda.h | 5 |
4 files changed, 25 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c index b675c5add01e..2ea42ceb08f3 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 66325a79ed53..6eff51e9400c 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 4884ca12444a..c8169d066cbd 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 dc33d28a72dd..c7ab38a601af 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 |
