Imported linux-2.6.27.39 suse/xen patches.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.fixes / qla2xxx-disable-automatic-queue-tracking

diff --git a/src/patches/suse-2.6.27.31/patches.fixes/qla2xxx-disable-automatic-queue-tracking b/src/patches/suse-2.6.27.31/patches.fixes/qla2xxx-disable-automatic-queue-tracking
deleted file mode 100644 (file)
index 2974b8d..0000000
--- a/src/patches/suse-2.6.27.31/patches.fixes/qla2xxx-disable-automatic-queue-tracking
+++ /dev/null
@@ -1,97 +0,0 @@
-From: Mike Reed <mdr@sgi.com>
-Subject: qla2xxx: Conditionally disable queue_full tracking
-References: bnc#449386
-
-Changing a lun's queue depth (/sys/block/sdX/device/queue_depth) isn't
-sticky when the device is connected via a QLogic fibre channel adapter.
-
-The QLogic qla2xxx fibre channel driver dynamically adjusts a lun's queue
-depth.  If a user has a specific need to limit the number of commands issued
-to a lun (say a tape drive, or a shared raid where the total commands issued
-to all luns is limited at the controller level, for example) and writes a
-limiting value to /sys/block/sdXX/device/queue_depth, the qla2xxx driver will
-silently and gradually increase the queue depth back to the driver limit
-of ql2xmaxqdepth.  While reducing this value (module parameter) or increasing
-the interval between ramp ups (ql2xqfullrampup) offers the potential for a
-work around it would be better to have the option of just disabling the
-dynamic adjustment of queue depth.
-
-This patch implements an "off switch" as a module parameter.  Applies to
-2.6.28-rc6-git1.
-
-Signed-off-by: Michael Reed <mdr@sgi.com>
-Signed-off-by: Hannes Reinecke <hare@suse.de>
-
----
- drivers/scsi/qla2xxx/qla_gbl.h |    1 +
- drivers/scsi/qla2xxx/qla_isr.c |   10 ++++++++++
- drivers/scsi/qla2xxx/qla_os.c  |    8 ++++++++
- 3 files changed, 19 insertions(+)
-
---- a/drivers/scsi/qla2xxx/qla_gbl.h
-+++ b/drivers/scsi/qla2xxx/qla_gbl.h
-@@ -63,6 +63,7 @@ extern int ql2xallocfwdump;
- extern int ql2xextended_error_logging;
- extern int ql2xqfullrampup;
- extern int ql2xiidmaenable;
-+extern int ql2xqfulltracking;
- 
- extern int qla2x00_loop_reset(scsi_qla_host_t *);
- extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
---- a/drivers/scsi/qla2xxx/qla_isr.c
-+++ b/drivers/scsi/qla2xxx/qla_isr.c
-@@ -691,6 +691,9 @@ qla2x00_adjust_sdev_qdepth_up(struct scs
- {
-       fc_port_t *fcport = data;
- 
-+      if (!ql2xqfulltracking)
-+              return;
-+
-       if (fcport->ha->max_q_depth <= sdev->queue_depth)
-               return;
- 
-@@ -729,6 +732,9 @@ qla2x00_ramp_up_queue_depth(scsi_qla_hos
-       fc_port_t *fcport;
-       struct scsi_device *sdev;
- 
-+      if (!ql2xqfulltracking)
-+              return;
-+
-       sdev = sp->cmd->device;
-       if (sdev->queue_depth >= ha->max_q_depth)
-               return;
-@@ -1043,6 +1049,8 @@ qla2x00_status_entry(scsi_qla_host_t *ha
-                           scsi_status));
- 
-                       /* Adjust queue depth for all luns on the port. */
-+                      if (!ql2xqfulltracking)
-+                              break;
-                       fcport->last_queue_full = jiffies;
-                       starget_for_each_device(cp->device->sdev_target,
-                           fcport, qla2x00_adjust_sdev_qdepth_down);
-@@ -1102,6 +1110,8 @@ qla2x00_status_entry(scsi_qla_host_t *ha
-                                * Adjust queue depth for all luns on the
-                                * port.
-                                */
-+                              if (!ql2xqfulltracking)
-+                                      break;
-                               fcport->last_queue_full = jiffies;
-                               starget_for_each_device(
-                                   cp->device->sdev_target, fcport,
---- a/drivers/scsi/qla2xxx/qla_os.c
-+++ b/drivers/scsi/qla2xxx/qla_os.c
-@@ -79,6 +79,14 @@ module_param(ql2xmaxqdepth, int, S_IRUGO
- MODULE_PARM_DESC(ql2xmaxqdepth,
-               "Maximum queue depth to report for target devices.");
- 
-+int ql2xqfulltracking = 1;
-+module_param(ql2xqfulltracking, int, S_IRUGO|S_IWUSR);
-+MODULE_PARM_DESC(ql2xqfulltracking,
-+              "Controls whether the driver tracks queue full status "
-+              "returns and dynamically adjusts a scsi device's queue "
-+              "depth.  Default is 1, perform tracking.  Set to 0 to "
-+              "disable dynamic tracking and adjustment of queue depth.");
-+
- int ql2xqfullrampup = 120;
- module_param(ql2xqfullrampup, int, S_IRUGO|S_IWUSR);
- MODULE_PARM_DESC(ql2xqfullrampup,