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blkcg: delete redundant get/put operations for queue
When calling blkcg_schedule_throttle(), for the same queue, redundant get/put operations can be removed. Signed-off-by: Chunguang Xu <brookxu@tencent.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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49d1822bc0
1 changed files with 8 additions and 5 deletions
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@ -1757,12 +1757,15 @@ void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay)
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if (unlikely(current->flags & PF_KTHREAD))
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if (unlikely(current->flags & PF_KTHREAD))
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return;
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return;
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if (!blk_get_queue(q))
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if (current->throttle_queue != q) {
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return;
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if (!blk_get_queue(q))
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return;
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if (current->throttle_queue)
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blk_put_queue(current->throttle_queue);
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current->throttle_queue = q;
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}
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if (current->throttle_queue)
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blk_put_queue(current->throttle_queue);
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current->throttle_queue = q;
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if (use_memdelay)
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if (use_memdelay)
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current->use_memdelay = use_memdelay;
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current->use_memdelay = use_memdelay;
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set_notify_resume(current);
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set_notify_resume(current);
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