mirrors/scst
1
0
Fork 0
mirror of https://github.com/SCST-project/scst.git synced 2026-05-17 02:31:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

ib_srpt/README: Clarify RoCE documentation

Browse Source 
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.0.x@6455 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2015-07-30 18:39:46 +00:00
parent 6e430b5ab6
commit e84285e7e6
2 changed files with 10 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
srpt/Makefile
View File

@@ -43,7 +43,7 @@ SRC_FILES=$(wildcard */*.[ch])
# The file Modules.symvers has been renamed in the 2.6.18 kernel to
# Module.symvers. Find out which name to use by looking in $(KDIR).
MODULE_SYMVERS:=$(shell if [ -e $(KDIR)/Module.symvers ]; then \
MODULE_SYMVERS:=$(shell if [ -e "$(KDIR)/Module.symvers" ]; then \
echo Module.symvers; else echo Modules.symvers; fi)
# Name of the OFED kernel RPM.

19
srpt/README
View File

@@ -47,10 +47,10 @@ The ib_srpt kernel module supports the following parameters:
GUID (e.g. 0002:c903:0005:f34a).
3. Access control configuration per HCA port and referring to a HCA via its
port GID (e.g. fe80:0000:0000:0000:0002:c903:0005:f34b).
Mode (1) is choosen if both one_target_per_port and
use_node_guid_in_target_name are false. Mode (2) is choosen if
Mode (1) is chosen if both one_target_per_port and
use_node_guid_in_target_name are false. Mode (2) is chosen if
one_target_per_port is false and use_node_guid_in_target_name is true. Mode
(3) is choosen if one_target_per_port is true. This last mode is the
(3) is chosen if one_target_per_port is true. This last mode is the
default mode.
* rdma_cm_port (number)
A 16-bit number that specifies the port number to be registered via the
@@ -90,12 +90,11 @@ The ib_srpt kernel module supports the following parameters:
Configuring the SRP Target System
---------------------------------
The first step is to choose whether access control will be controlled per
HCA or per HCA port and to create a modprobe configuration file that reflects
this choice. An example:
When using RoCE or iWARP the first step is to enable support for these
protocols in the target driver by setting the rdma_cm_port kernel module
parameter to a non-zero value. An example:
# cat /etc/modprobe.d/ib_srpt.conf
options ib_srpt one_target_per_port=1
echo options ib_srpt rdma_cm_port=5000 > /etc/modprobe.d/ib_srpt.conf
Next, create the file /etc/scst.conf. You can create this file with
the scstadmin tool as follows:
@@ -157,7 +156,7 @@ When using RoCE or iWARP, log in to the target system to determine the id_ext
and ioc_guid parameters and use these to log in. An example:
[ target system ]
# sed 's/,\(pkey\|dgid\|service_id\)=[^,]*//g' $(find /sys/kernel/scst_tgt/targets/ib_srpt -name login_info) | uniq
# sed 's/tid_ext=/id_ext=/;s/,\(pkey\|dgid\|service_id\)=[^,]*//g' $(find /sys/kernel/scst_tgt/targets/ib_srpt -name login_info) | uniq
id_ext=0002c90300a34270,ioc_guid=0002c90300a34270
[ initiator system ]
@@ -353,7 +352,7 @@ Performance Notes - Target Side
improves performance compared to debug mode.
* When using high-latency storage devices (hard disks), the default value
choosen by SCST for DEVICE.threads_num should be fine. When using
chosen by SCST for DEVICE.threads_num should be fine. When using
low-latency storage devices though (SSDs), DEVICE.threads_num should be set
to 1 or 2 in /etc/scst.conf in order to reach optimal performance for small
block sizes (e.g. 4 KB).