AcoSail/kernel_optimize_test
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x86: remove some alloc_bootmem_cpumask_var calling

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Now that we set up the slab allocator earlier, we can get rid of some
alloc_bootmem_cpumask_var() calls in boot code.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Yinghai Lu 2009-05-25 15:10:58 +03:00 committed by Pekka Enberg
parent a5f4f52e82
commit 38c7fed2f5
5 changed files with 13 additions and 30 deletions
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4
arch/x86/kernel/apic/io_apic.c
View File

@ -185,8 +185,8 @@ int __init arch_early_irq_init(void)
for (i = 0; i < count; i++) {
desc = irq_to_desc(i);
desc->chip_data = &cfg[i];
alloc_bootmem_cpumask_var(&cfg[i].domain);
alloc_bootmem_cpumask_var(&cfg[i].old_domain);
alloc_cpumask_var(&cfg[i].domain, GFP_NOWAIT);
alloc_cpumask_var(&cfg[i].old_domain, GFP_NOWAIT);
if (i < NR_IRQS_LEGACY)
cpumask_setall(cfg[i].domain);
}

20
include/linux/irq.h
View File

@ -430,23 +430,19 @@ extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
* Returns true if successful (or not required).
*/
static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
bool boot)
bool boot)
{
gfp_t gfp = GFP_ATOMIC;
if (boot)
gfp = GFP_NOWAIT;
#ifdef CONFIG_CPUMASK_OFFSTACK
if (boot) {
alloc_bootmem_cpumask_var(&desc->affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
alloc_bootmem_cpumask_var(&desc->pending_mask);
#endif
return true;
}
if (!alloc_cpumask_var_node(&desc->affinity, GFP_ATOMIC, node))
if (!alloc_cpumask_var_node(&desc->affinity, gfp, node))
return false;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (!alloc_cpumask_var_node(&desc->pending_mask, GFP_ATOMIC, node)) {
if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
free_cpumask_var(desc->affinity);
return false;
}

2
kernel/cpuset.c
View File

@ -1857,7 +1857,7 @@ struct cgroup_subsys cpuset_subsys = {
int __init cpuset_init_early(void)
{
alloc_bootmem_cpumask_var(&top_cpuset.cpus_allowed);
alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_NOWAIT);
top_cpuset.mems_generation = cpuset_mems_generation++;
return 0;

6
kernel/profile.c
View File

@ -111,12 +111,6 @@ int __ref profile_init(void)
/* only text is profiled */
prof_len = (_etext - _stext) >> prof_shift;
buffer_bytes = prof_len*sizeof(atomic_t);
if (!slab_is_available()) {
prof_buffer = alloc_bootmem(buffer_bytes);
alloc_bootmem_cpumask_var(&prof_cpu_mask);
cpumask_copy(prof_cpu_mask, cpu_possible_mask);
return 0;
}
if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
return -ENOMEM;

11
lib/cpumask.c
View File

@ -92,15 +92,8 @@ int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
*/
bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
{
if (likely(slab_is_available()))
*mask = kmalloc_node(cpumask_size(), flags, node);
else {
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
printk(KERN_ERR
"=> alloc_cpumask_var: kmalloc not available!\n");
#endif
*mask = NULL;
}
*mask = kmalloc_node(cpumask_size(), flags, node);
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
if (!*mask) {
printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");