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mm/page_alloc: Convert to hotplug state machine

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Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161103145021.28528-7-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Sebastian Andrzej Siewior 2016-11-03 15:50:02 +01:00 committed by Thomas Gleixner
parent d544abd5ff
commit 005fd4bbef
2 changed files with 26 additions and 24 deletions
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1
include/linux/cpuhotplug.h
View File

@ -35,6 +35,7 @@ enum cpuhp_state {
CPUHP_MM_MEMCQ_DEAD, CPUHP_MM_MEMCQ_DEAD,
CPUHP_PERCPU_CNT_DEAD, CPUHP_PERCPU_CNT_DEAD,
CPUHP_RADIX_DEAD, CPUHP_RADIX_DEAD,
CPUHP_PAGE_ALLOC_DEAD,
CPUHP_WORKQUEUE_PREP, CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE, CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE, CPUHP_HRTIMERS_PREPARE,

15
mm/page_alloc.c
View File

@ -6491,12 +6491,9 @@ void __init free_area_init(unsigned long *zones_size)
__pa(PAGE_OFFSET) >> PAGE_SHIFT, NULL); __pa(PAGE_OFFSET) >> PAGE_SHIFT, NULL);
} }
static int page_alloc_cpu_notify(struct notifier_block *self, static int page_alloc_cpu_dead(unsigned int cpu)
unsigned long action, void *hcpu)
{ {
int cpu = (unsigned long)hcpu;
if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
lru_add_drain_cpu(cpu); lru_add_drain_cpu(cpu);
drain_pages(cpu); drain_pages(cpu);
@ -6516,13 +6513,17 @@ static int page_alloc_cpu_notify(struct notifier_block *self,
* race with what we are doing. * race with what we are doing.
*/ */
cpu_vm_stats_fold(cpu); cpu_vm_stats_fold(cpu);
} return 0;
return NOTIFY_OK;
} }
void __init page_alloc_init(void) void __init page_alloc_init(void)
{ {
hotcpu_notifier(page_alloc_cpu_notify, 0); int ret;
ret = cpuhp_setup_state_nocalls(CPUHP_PAGE_ALLOC_DEAD,
"mm/page_alloc:dead", NULL,
page_alloc_cpu_dead);
WARN_ON(ret < 0);
} }
/* /*