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Chapter 6: Installing the Linux Drivers
76
Note
Broadcom validation is limited to a power of 2; for example, 32, 64,
or 128.
rq_size
Use the “Configure RQ size” parameter to choose the size of
asynchronous buffer queue size per offloaded connections. The RQ size
is not required to be greater than 16 because it is used to place iSCSI
ASYNC/NOP/REJECT messages and SCSI sense data.
Defaults: 16
Range: 16 to 32
Note
Broadcom validation is limited to a power of 2; for example, 16, 32,
or 128.
event_coal_div
The Event Coalescing Divide Factor parameter is a performance tuning
parameter used to moderate the rate of interrupt generation by the iscsi
firmware.
Defaults: 1
Valid values: 1, 2, 4, 8
bnx2i_nopout_when_commands_active
The “iSCSI NOOP even when connection is not idle” parameter enables
the offload initiator to send iSCSI NOP-OUT on wire even when the link is
not truly idle. This parameter was introduced to avoid unnecessary
session recoveries induced by some older targets when iSCSI NOP-OUT
and iSCSI CMD pdus are intermixed. Newer iSCSI target systems are
immune to this condition and this parameter is turned ON for quite some
time.
Defaults: 1
Values: Binary parameter, 0/1
The parameters can also be set in the modprobe.conf command. See
the man page for more information.