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[SCSI] cxgb3i, iser, iscsi_tcp: set target can queue

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Set target can queue limit to the number of preallocated
session tasks we have.

This along with the cxgb3i can_queue patch will fix a throughput
problem where it could only queue one LU worth of data at a time.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie 2009-04-21 15:32:32 -05:00 committed by James Bottomley
parent 9a6510eb3f
commit 6b5d6c443a
5 changed files with 15 additions and 0 deletions
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1
drivers/infiniband/ulp/iser/iscsi_iser.c
View File

@ -599,6 +599,7 @@ static struct scsi_host_template iscsi_iser_sht = {
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_target_reset_handler= iscsi_eh_target_reset,
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "iscsi_iser",
.this_id = -1,

1
drivers/scsi/cxgb3i/cxgb3i_iscsi.c
View File

@ -883,6 +883,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_target_reset,
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,
};

1
drivers/scsi/iscsi_tcp.c
View File

@ -851,6 +851,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.use_clustering = DISABLE_CLUSTERING,
.slave_alloc = iscsi_sw_tcp_slave_alloc,
.slave_configure = iscsi_sw_tcp_slave_configure,
.target_alloc = iscsi_target_alloc,
.proc_name = "iscsi_tcp",
.this_id = -1,
};

10
drivers/scsi/libiscsi.c
View File

@ -1463,6 +1463,16 @@ int iscsi_change_queue_depth(struct scsi_device *sdev, int depth)
}
EXPORT_SYMBOL_GPL(iscsi_change_queue_depth);
int iscsi_target_alloc(struct scsi_target *starget)
{
struct iscsi_cls_session *cls_session = starget_to_session(starget);
struct iscsi_session *session = cls_session->dd_data;
starget->can_queue = session->scsi_cmds_max;
return 0;
}
EXPORT_SYMBOL_GPL(iscsi_target_alloc);
void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = cls_session->dd_data;

2
include/scsi/libiscsi.h
View File

@ -36,6 +36,7 @@ struct scsi_transport_template;
struct scsi_host_template;
struct scsi_device;
struct Scsi_Host;
struct scsi_target;
struct scsi_cmnd;
struct socket;
struct iscsi_transport;
@ -350,6 +351,7 @@ extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
bool xmit_can_sleep);
extern void iscsi_host_remove(struct Scsi_Host *shost);
extern void iscsi_host_free(struct Scsi_Host *shost);
extern int iscsi_target_alloc(struct scsi_target *starget);
/*
* session management