blk_mq_try_issue_directly

Name:blk_mq_try_issue_directly

Proto:static void blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx, struct request *rq, blk_qc_t *cookie)

Type:void

Parameter:

Type	Parameter	Name
struct blk_mq_hw_ctx *	hctx
struct request *	rq
blk_qc_t *	cookie

1837

might_sleep_if(@flags: BLK_MQ_F_* flags. Defines the behaviour of the queue. & BLK_MQ_F_BLOCKING)

1839

hctx_lock(hctx, & srcu_idx)

1841

ret = __blk_mq_try_issue_directly(hctx, rq, cookie, TSC's on different sockets may be reset asynchronously.* This may cause the TSC ADJUST value on socket 0 to be NOT 0., true)

1842

If ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE is returned from the driver to the block layer if* device related resources are unavailable, but the driver can guarantee* that the queue will be rerun in the future once resources become* available again Then Should only be used carefully, when the caller knows we want to* bypass a potential IO scheduler on the target device.

1844

Else if ret != BLK_STS_OK Then blk_mq_end_request(rq, ret)

1847

hctx_unlock(hctx, srcu_idx)

**Caller**
Name	Describe
blk_mq_make_request

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