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| author | Mike Travis <travis@sgi.com> | 2007-10-16 01:24:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:50 -0700 |
| commit | d5a7430ddcdb598261d70f7eb1bf450b5be52085 (patch) | |
| tree | 3b94672e0dbc2bff125de3266908f1a47a17b795 /arch/ia64 | |
| parent | 083576112940fda783d716fd5ccc744f81667b2f (diff) | |
| download | linux-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.gz | |
Convert cpu_sibling_map to be a per cpu variable
Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/kernel/setup.c | 12 | ||||
| -rw-r--r-- | arch/ia64/kernel/smpboot.c | 18 |
2 files changed, 18 insertions, 12 deletions
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 9e392a30d197..777c8d8bd5e7 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -528,10 +528,6 @@ setup_arch (char **cmdline_p) #ifdef CONFIG_SMP cpu_physical_id(0) = hard_smp_processor_id(); - - cpu_set(0, cpu_sibling_map[0]); - cpu_set(0, cpu_core_map[0]); - check_for_logical_procs(); if (smp_num_cpucores > 1) printk(KERN_INFO @@ -873,6 +869,14 @@ cpu_init (void) void *cpu_data; cpu_data = per_cpu_init(); + /* + * insert boot cpu into sibling and core mapes + * (must be done after per_cpu area is setup) + */ + if (smp_processor_id() == 0) { + cpu_set(0, per_cpu(cpu_sibling_map, 0)); + cpu_set(0, cpu_core_map[0]); + } /* * We set ar.k3 so that assembly code in MCA handler can compute diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c index 308772f7cddc..c57dbce25c12 100644 --- a/arch/ia64/kernel/smpboot.c +++ b/arch/ia64/kernel/smpboot.c @@ -138,7 +138,9 @@ cpumask_t cpu_possible_map = CPU_MASK_NONE; EXPORT_SYMBOL(cpu_possible_map); cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned; -cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned; +DEFINE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map); +EXPORT_PER_CPU_SYMBOL(cpu_sibling_map); + int smp_num_siblings = 1; int smp_num_cpucores = 1; @@ -650,12 +652,12 @@ clear_cpu_sibling_map(int cpu) { int i; - for_each_cpu_mask(i, cpu_sibling_map[cpu]) - cpu_clear(cpu, cpu_sibling_map[i]); + for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu)) + cpu_clear(cpu, per_cpu(cpu_sibling_map, i)); for_each_cpu_mask(i, cpu_core_map[cpu]) cpu_clear(cpu, cpu_core_map[i]); - cpu_sibling_map[cpu] = cpu_core_map[cpu] = CPU_MASK_NONE; + per_cpu(cpu_sibling_map, cpu) = cpu_core_map[cpu] = CPU_MASK_NONE; } static void @@ -666,7 +668,7 @@ remove_siblinginfo(int cpu) if (cpu_data(cpu)->threads_per_core == 1 && cpu_data(cpu)->cores_per_socket == 1) { cpu_clear(cpu, cpu_core_map[cpu]); - cpu_clear(cpu, cpu_sibling_map[cpu]); + cpu_clear(cpu, per_cpu(cpu_sibling_map, cpu)); return; } @@ -807,8 +809,8 @@ set_cpu_sibling_map(int cpu) cpu_set(i, cpu_core_map[cpu]); cpu_set(cpu, cpu_core_map[i]); if (cpu_data(cpu)->core_id == cpu_data(i)->core_id) { - cpu_set(i, cpu_sibling_map[cpu]); - cpu_set(cpu, cpu_sibling_map[i]); + cpu_set(i, per_cpu(cpu_sibling_map, cpu)); + cpu_set(cpu, per_cpu(cpu_sibling_map, i)); } } } @@ -839,7 +841,7 @@ __cpu_up (unsigned int cpu) if (cpu_data(cpu)->threads_per_core == 1 && cpu_data(cpu)->cores_per_socket == 1) { - cpu_set(cpu, cpu_sibling_map[cpu]); + cpu_set(cpu, per_cpu(cpu_sibling_map, cpu)); cpu_set(cpu, cpu_core_map[cpu]); return 0; } |