Users Guide

8–VMware Driver Software
Driver Parameters
Doc No. BC0054508-00 Rev. R
January 21, 2021 Page 78 Copyright © 2021 Marvell
en_hba_poll
The en_hba_poll parameter sets the adapter poll timer. The default value
is 0.
en_tcp_dack
The en_tcp_dack parameter enables TCP delayed ACK. Enabling TCP
delayed ACK helps improve network performance by combining several ACKs in
a single response. The default value is 1 (enabled).
Certain iSCSI targets do not handle ACK piggybacking. If this parameter is
enabled on these types of targets, the host cannot login to the target. If this even
occurs, Marvell recommends disabling this parameter.
error_mask1, error_mask2
Use the error_mask (Configure firmware iSCSI error mask #) parameters to
configure a specific iSCSI protocol violation to be treated either as a warning or a
fatal error. All fatal iSCSI protocol violations will result in session recovery (ERL 0).
These are bit masks.
Defaults: All violations are treated as errors.
event_coal_div
The event_coal_div parameter sets the event coalescing divide factor. The
default value is 1.
event_coal_min
The event_coal_min parameter sets the minimum number of
event-coalescing commands. The default is 24.
ooo_enable
The ooo_enable (enable TCP out-of-order) parameter feature enables and
disables TCP out-of-order RX handling feature on offloaded iSCSI connections.
Set to 0 to disable this support. Set to 1 (default) to enable this support.
CAUTION
Do not use error_mask if you are not sure about the consequences.
These values are to be discussed with the Marvell development team on a
case-by-case basis. This parameter is just a mechanism to work around
iSCSI implementation issues on the target side and without proper
knowledge of iSCSI protocol details, users are advised not to experiment
with these parameters.