migration/dirtyrate: adjust order of registering thread
registering get_dirtyrate thread in advance so that both page-sampling and dirty-ring mode can be covered. Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> Message-Id: <d7727581a8e86d4a42fc3eacf7f310419b9ebf7e.1624040308.git.huangy81@chinatelecom.cn> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
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15eb2d644c
@ -352,7 +352,6 @@ static void calculate_dirtyrate(struct DirtyRateConfig config)
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int64_t msec = 0;
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int64_t initial_time;
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rcu_register_thread();
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rcu_read_lock();
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initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
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if (!record_ramblock_hash_info(&block_dinfo, config, &block_count)) {
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@ -375,7 +374,6 @@ static void calculate_dirtyrate(struct DirtyRateConfig config)
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out:
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rcu_read_unlock();
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free_ramblock_dirty_info(block_dinfo, block_count);
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rcu_unregister_thread();
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}
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void *get_dirtyrate_thread(void *arg)
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@ -383,6 +381,7 @@ void *get_dirtyrate_thread(void *arg)
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struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg;
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int ret;
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int64_t start_time;
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rcu_register_thread();
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ret = dirtyrate_set_state(&CalculatingState, DIRTY_RATE_STATUS_UNSTARTED,
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DIRTY_RATE_STATUS_MEASURING);
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@ -401,6 +400,8 @@ void *get_dirtyrate_thread(void *arg)
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if (ret == -1) {
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error_report("change dirtyrate state failed.");
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}
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rcu_unregister_thread();
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return NULL;
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}
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