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[SCSI] iscsi: dont use sendpage for iscsi headers
From Zhen and ported by Mike: Don't use sendpage for the headers. sendpage for the pdu headers does not seem to have a performance impact, makes life harder for mutiple data pdus to be in flight and still trips up some network cards when it is from slab mem. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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parent
07fb75a506
commit
6e458cc943
1 changed files with 8 additions and 16 deletions
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@ -70,14 +70,6 @@ module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
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/* global data */
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static kmem_cache_t *taskcache;
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static inline void
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iscsi_buf_init_virt(struct iscsi_buf *ibuf, char *vbuf, int size)
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{
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sg_init_one(&ibuf->sg, (u8 *)vbuf, size);
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ibuf->sent = 0;
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ibuf->use_sendmsg = 0;
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}
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static inline void
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iscsi_buf_init_iov(struct iscsi_buf *ibuf, char *vbuf, int size)
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{
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@ -324,7 +316,7 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
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r2t->sent = 0;
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iscsi_buf_init_virt(&r2t->headbuf, (char*)hdr,
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iscsi_buf_init_iov(&r2t->headbuf, (char*)hdr,
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sizeof(struct iscsi_hdr));
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r2t->dtask = dtask;
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@ -1208,7 +1200,7 @@ iscsi_digest_final_send(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
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if (final)
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crypto_digest_final(tcp_conn->data_tx_tfm, (u8*)digest);
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iscsi_buf_init_virt(buf, (char*)digest, 4);
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iscsi_buf_init_iov(buf, (char*)digest, 4);
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rc = iscsi_sendpage(conn, buf, &tcp_ctask->digest_count, &sent);
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if (rc) {
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tcp_ctask->datadigest = *digest;
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@ -1265,7 +1257,7 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
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}
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conn->dataout_pdus_cnt++;
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iscsi_buf_init_virt(&r2t->headbuf, (char*)hdr,
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iscsi_buf_init_iov(&r2t->headbuf, (char*)hdr,
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sizeof(struct iscsi_hdr));
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r2t->dtask = dtask;
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@ -1294,7 +1286,7 @@ iscsi_unsolicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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iscsi_prep_unsolicit_data_pdu(ctask, &dtask->hdr,
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tcp_ctask->r2t_data_count);
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iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)&dtask->hdr,
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iscsi_buf_init_iov(&tcp_ctask->headbuf, (char*)&dtask->hdr,
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sizeof(struct iscsi_hdr));
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list_add(&dtask->item, &tcp_ctask->dataqueue);
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@ -1361,7 +1353,7 @@ iscsi_tcp_cmd_init(struct iscsi_cmd_task *ctask)
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} else
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tcp_ctask->xmstate = XMSTATE_R_HDR;
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iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)ctask->hdr,
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iscsi_buf_init_iov(&tcp_ctask->headbuf, (char*)ctask->hdr,
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sizeof(struct iscsi_hdr));
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}
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@ -1758,7 +1750,7 @@ handle_xmstate_w_pad(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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int sent;
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tcp_ctask->xmstate &= ~XMSTATE_W_PAD;
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iscsi_buf_init_virt(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad,
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iscsi_buf_init_iov(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad,
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tcp_ctask->pad_count);
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if (iscsi_sendpage(conn, &tcp_ctask->sendbuf, &tcp_ctask->pad_count,
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&sent)) {
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@ -2078,8 +2070,8 @@ iscsi_tcp_mgmt_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask,
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{
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struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
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iscsi_buf_init_virt(&tcp_mtask->headbuf, (char*)mtask->hdr,
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sizeof(struct iscsi_hdr));
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iscsi_buf_init_iov(&tcp_mtask->headbuf, (char*)mtask->hdr,
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sizeof(struct iscsi_hdr));
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tcp_mtask->xmstate = XMSTATE_IMM_HDR;
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if (mtask->data_count)
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