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PDU further optimize iscsi_add_data()

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This patch further improves add data and esepcially preassigns
the right amount of memory where the amount is preknown
This commit is contained in:
Peter Lieven
2012-11-05 15:13:50 +01:00
parent b5183d5e30
commit 65cd38e8ff
5 changed files with 51 additions and 14 deletions
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17
lib/scsi-command.c
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@@ -85,10 +85,11 @@ iscsi_send_data_out(struct iscsi_context *iscsi, struct iscsi_pdu *cmd_pdu,
len = iscsi->target_max_recv_data_segment_length;
}
pdu = iscsi_allocate_pdu_with_itt_flags(iscsi, ISCSI_PDU_DATA_OUT,
pdu = iscsi_allocate_pdu_with_itt_flags_size(iscsi, ISCSI_PDU_DATA_OUT,
ISCSI_PDU_NO_PDU,
cmd_pdu->itt,
ISCSI_PDU_DELETE_WHEN_SENT|ISCSI_PDU_NO_CALLBACK);
ISCSI_PDU_DELETE_WHEN_SENT|ISCSI_PDU_NO_CALLBACK,
len);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Out-of-memory, Failed to allocate "
"scsi data out pdu.");
@@ -198,8 +199,16 @@ iscsi_scsi_command_async(struct iscsi_context *iscsi, int lun,
scsi_set_task_private_ptr(task, scsi_cbdata);
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_SCSI_REQUEST,
ISCSI_PDU_SCSI_RESPONSE);
u_int32_t payload_size = 0;
if (iscsi->use_immediate_data == ISCSI_IMMEDIATE_DATA_YES) {
payload_size=data.size;
if (payload_size > iscsi->first_burst_length) {
payload_size = iscsi->first_burst_length;
}
}
pdu = iscsi_allocate_pdu_size(iscsi, ISCSI_PDU_SCSI_REQUEST,
ISCSI_PDU_SCSI_RESPONSE, payload_size);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Out-of-memory, Failed to allocate "
"scsi pdu.");