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| author | Mike Christie <michaelc@cs.wisc.edu> | 2006-05-18 20:31:31 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-05-20 09:34:21 -0500 |
| commit | 6e458cc943dd494ac68b570418f187883e555362 (patch) | |
| tree | 11519c1b451bfb54a1dcf0a003dfe183c9c34fd7 | |
| parent | 07fb75a50600c0c480b40c6d11dbc993f21bc2bc (diff) | |
| download | op-kernel-dev-6e458cc943dd494ac68b570418f187883e555362.zip op-kernel-dev-6e458cc943dd494ac68b570418f187883e555362.tar.gz | |
[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>
| -rw-r--r-- | drivers/scsi/iscsi_tcp.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index d94038e..7c2ed7b 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -71,14 +71,6 @@ module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); static kmem_cache_t *taskcache; static inline void -iscsi_buf_init_virt(struct iscsi_buf *ibuf, char *vbuf, int size) -{ - sg_init_one(&ibuf->sg, (u8 *)vbuf, size); - ibuf->sent = 0; - ibuf->use_sendmsg = 0; -} - -static inline void iscsi_buf_init_iov(struct iscsi_buf *ibuf, char *vbuf, int size) { ibuf->sg.page = virt_to_page(vbuf); @@ -324,7 +316,7 @@ iscsi_solicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, r2t->sent = 0; - iscsi_buf_init_virt(&r2t->headbuf, (char*)hdr, + iscsi_buf_init_iov(&r2t->headbuf, (char*)hdr, sizeof(struct iscsi_hdr)); r2t->dtask = dtask; @@ -1208,7 +1200,7 @@ iscsi_digest_final_send(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, if (final) crypto_digest_final(tcp_conn->data_tx_tfm, (u8*)digest); - iscsi_buf_init_virt(buf, (char*)digest, 4); + iscsi_buf_init_iov(buf, (char*)digest, 4); rc = iscsi_sendpage(conn, buf, &tcp_ctask->digest_count, &sent); if (rc) { tcp_ctask->datadigest = *digest; @@ -1265,7 +1257,7 @@ iscsi_solicit_data_cont(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask, } conn->dataout_pdus_cnt++; - iscsi_buf_init_virt(&r2t->headbuf, (char*)hdr, + iscsi_buf_init_iov(&r2t->headbuf, (char*)hdr, sizeof(struct iscsi_hdr)); r2t->dtask = dtask; @@ -1294,7 +1286,7 @@ iscsi_unsolicit_data_init(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) iscsi_prep_unsolicit_data_pdu(ctask, &dtask->hdr, tcp_ctask->r2t_data_count); - iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)&dtask->hdr, + iscsi_buf_init_iov(&tcp_ctask->headbuf, (char*)&dtask->hdr, sizeof(struct iscsi_hdr)); list_add(&dtask->item, &tcp_ctask->dataqueue); @@ -1361,7 +1353,7 @@ iscsi_tcp_cmd_init(struct iscsi_cmd_task *ctask) } else tcp_ctask->xmstate = XMSTATE_R_HDR; - iscsi_buf_init_virt(&tcp_ctask->headbuf, (char*)ctask->hdr, + iscsi_buf_init_iov(&tcp_ctask->headbuf, (char*)ctask->hdr, sizeof(struct iscsi_hdr)); } @@ -1758,7 +1750,7 @@ handle_xmstate_w_pad(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) int sent; tcp_ctask->xmstate &= ~XMSTATE_W_PAD; - iscsi_buf_init_virt(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad, + iscsi_buf_init_iov(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad, tcp_ctask->pad_count); if (iscsi_sendpage(conn, &tcp_ctask->sendbuf, &tcp_ctask->pad_count, &sent)) { @@ -2078,8 +2070,8 @@ iscsi_tcp_mgmt_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask, { struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data; - iscsi_buf_init_virt(&tcp_mtask->headbuf, (char*)mtask->hdr, - sizeof(struct iscsi_hdr)); + iscsi_buf_init_iov(&tcp_mtask->headbuf, (char*)mtask->hdr, + sizeof(struct iscsi_hdr)); tcp_mtask->xmstate = XMSTATE_IMM_HDR; if (mtask->data_count) |
