[SCSI] iscsi: only preallocate login buffer
We only use the mtask data buffer for login tasks so we do not
need to preallocate a buffer for every mtask. This saves
8 * 31 KB.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 4750d48..580c050 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1258,15 +1258,6 @@
if (mgmt_task_size)
mtask->dd_data = &mtask[1];
mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i;
- mtask->data = kmalloc(DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH,
- GFP_KERNEL);
- if (!mtask->data) {
- int j;
-
- for (j = 0; j < cmd_i; j++)
- kfree(session->mgmt_cmds[j]->data);
- goto immdata_alloc_fail;
- }
}
if (scsi_add_host(shost, NULL))
@@ -1282,9 +1273,6 @@
cls_session_fail:
scsi_remove_host(shost);
add_host_fail:
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
- kfree(session->mgmt_cmds[cmd_i]->data);
-immdata_alloc_fail:
iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
mgmtpool_alloc_fail:
iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
@@ -1305,13 +1293,9 @@
{
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
- int cmd_i;
scsi_remove_host(shost);
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++)
- kfree(session->mgmt_cmds[cmd_i]->data);
-
iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
@@ -1331,6 +1315,7 @@
struct iscsi_session *session = class_to_transport_session(cls_session);
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
+ char *data;
cls_conn = iscsi_create_conn(cls_session, conn_idx);
if (!cls_conn)
@@ -1376,12 +1361,20 @@
}
spin_unlock_bh(&session->lock);
+ data = kmalloc(DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH, GFP_KERNEL);
+ if (!data)
+ goto login_mtask_data_alloc_fail;
+ conn->login_mtask->data = data;
+
init_timer(&conn->tmabort_timer);
mutex_init(&conn->xmitmutex);
init_waitqueue_head(&conn->ehwait);
return cls_conn;
+login_mtask_data_alloc_fail:
+ __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+ sizeof(void*));
login_mtask_alloc_fail:
kfifo_free(conn->mgmtqueue);
mgmtqueue_alloc_fail:
@@ -1451,6 +1444,7 @@
}
spin_lock_bh(&session->lock);
+ kfree(conn->login_mtask->data);
__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
sizeof(void*));
list_del(&conn->item);