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| author | Mike Christie <michaelc@cs.wisc.edu> | 2005-11-29 23:12:59 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-12-13 18:12:00 -0700 |
| commit | 9e3961ba2be51a88c6223143568c80e0616d93ce (patch) | |
| tree | b811c3ab70d14997718596c9ec21a08561b34d5f /drivers/scsi/iscsi_tcp.c | |
| parent | f6cfba1d21e9e4afd80e2274aa4df3dc1bd0aab7 (diff) | |
| download | op-kernel-dev-9e3961ba2be51a88c6223143568c80e0616d93ce.zip op-kernel-dev-9e3961ba2be51a88c6223143568c80e0616d93ce.tar.gz | |
[SCSI] iscsi: lower queue depth
From Wang Zhenyu:
High queue depth was a problem for some targets so make queue_depth adjustable
From Mike Christie
Make default queue_depth a little lower
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.c')
| -rw-r--r-- | drivers/scsi/iscsi_tcp.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 83e2f8c..5b14c40 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -2402,6 +2402,15 @@ fault: } static int +iscsi_change_queue_depth(struct scsi_device *sdev, int depth) +{ + if (depth > ISCSI_MAX_CMD_PER_LUN) + depth = ISCSI_MAX_CMD_PER_LUN; + scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); + return sdev->queue_depth; +} + +static int iscsi_pool_init(struct iscsi_queue *q, int max, void ***items, int item_size) { int i; @@ -3260,13 +3269,14 @@ iscsi_r2tpool_free(struct iscsi_session *session) static struct scsi_host_template iscsi_sht = { .name = "iSCSI Initiator over TCP/IP, v." ISCSI_VERSION_STR, - .queuecommand = iscsi_queuecommand, + .queuecommand = iscsi_queuecommand, + .change_queue_depth = iscsi_change_queue_depth, .can_queue = ISCSI_XMIT_CMDS_MAX - 1, .sg_tablesize = ISCSI_SG_TABLESIZE, - .cmd_per_lun = ISCSI_CMD_PER_LUN, - .eh_abort_handler = iscsi_eh_abort, - .eh_host_reset_handler = iscsi_eh_host_reset, - .use_clustering = DISABLE_CLUSTERING, + .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, + .eh_abort_handler = iscsi_eh_abort, + .eh_host_reset_handler = iscsi_eh_host_reset, + .use_clustering = DISABLE_CLUSTERING, .proc_name = "iscsi_tcp", .this_id = -1, }; |
