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cpus: Introduce cpu_list_generation_id

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Introduce cpu_list_generation_id to track cpu list generation so
that cpu hotplug/unplug can be detected during measurement of
dirty page rate.

cpu_list_generation_id could be used to detect changes of cpu
list, which is prepared for dirty page rate measurement.

Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <06e1f1362b2501a471dce796abb065b04f320fa5.1656177590.git.huangy81@chinatelecom.cn>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Hyman Huang(黄勇) 2022-06-26 01:38:31 +08:00 committed by Dr. David Alan Gilbert
parent 1667e2b97b
commit ab1a161fe3
2 changed files with 9 additions and 0 deletions
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8
cpus-common.c
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@ -73,6 +73,12 @@ static int cpu_get_free_index(void)
} }
CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus); CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
static unsigned int cpu_list_generation_id;
unsigned int cpu_list_generation_id_get(void)
{
return cpu_list_generation_id;
}
void cpu_list_add(CPUState *cpu) void cpu_list_add(CPUState *cpu)
{ {
@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu)
assert(!cpu_index_auto_assigned); assert(!cpu_index_auto_assigned);
} }
QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node); QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
cpu_list_generation_id++;
} }
void cpu_list_remove(CPUState *cpu) void cpu_list_remove(CPUState *cpu)
@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu)
QTAILQ_REMOVE_RCU(&cpus, cpu, node); QTAILQ_REMOVE_RCU(&cpus, cpu, node);
cpu->cpu_index = UNASSIGNED_CPU_INDEX; cpu->cpu_index = UNASSIGNED_CPU_INDEX;
cpu_list_generation_id++;
} }
CPUState *qemu_get_cpu(int index) CPUState *qemu_get_cpu(int index)

1
include/exec/cpu-common.h
View File

@ -35,6 +35,7 @@ extern intptr_t qemu_host_page_mask;
void qemu_init_cpu_list(void); void qemu_init_cpu_list(void);
void cpu_list_lock(void); void cpu_list_lock(void);
void cpu_list_unlock(void); void cpu_list_unlock(void);
unsigned int cpu_list_generation_id_get(void);
void tcg_flush_softmmu_tlb(CPUState *cs); void tcg_flush_softmmu_tlb(CPUState *cs);