TRACE_BLOCK_RQ_INSER(9) Block IO TRACE_BLOCK_RQ_INSER(9)NAME
trace_block_rq_insert - insert block operation request into queue
SYNOPSIS
void trace_block_rq_insert(struct request_queue * q, struct request * rq);
ARGUMENTS
q
target queue
rq
block IO operation request
DESCRIPTION
Called immediately before block operation request rq is inserted into queue q. The fields in the operation request rq struct can be
examined to determine which device and sectors the pending operation would access.
AUTHORS
Jason Baron <jbaron@redhat.com>
Author.
William Cohen <wcohen@redhat.com>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 TRACE_BLOCK_RQ_INSER(9)
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RDMA_POST_UD_SEND(3) Librdmacm Programmer's Manual RDMA_POST_UD_SEND(3)NAME
rdma_post_ud_send - post a work request to send a datagram.
SYNOPSIS
#include <rdma/rdma_verbs.h>
int rdma_post_ud_send (struct rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr, int flags, struct ibv_ah *ah,
uint32_t remote_qpn);
ARGUMENTS
id A reference to a communication identifier where the message buffer will be posted.
context User-defined context associated with the request.
addr The address of the memory buffer to post.
length The length of the memory buffer.
mr Optional registered memory region associated with the posted buffer.
flags Optional flags used to control the send operation.
ah An address handle describing the address of the remote node.
remote_qpn The number of the destination queue pair.
DESCRIPTION
Posts a work request to the send queue of the queue pair associated with the rdma_cm_id. The contents of the posted buffer will be sent to
the specified destination queue pair.
RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason.
NOTES
The user is responsible for ensuring that the destination queue pair has queued a receive request before issuing the send operations. For
a list of supported flags, see ibv_post_send. Unless the send request is using inline data, the message buffer must have been registered
before being posted, with the mr parameter referencing the registration. The buffer must remain registered until the send completes.
The user-defined context associated with the send request will be returned to the user through the work completion wr_id, work request
identifier, field.
SEE ALSO rdma_cm(7), rdma_connect(3), rdma_accept(3), rdma_reg_msgs(3)ibv_post_send(3), rdma_post_recv(3)librdmacm 2010-07-19 RDMA_POST_UD_SEND(3)
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