Dell Emulex Family of Adapters - Manual (Page 826)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
FC and FCoE Driver Configuration
826
Dynamic FC and FCoE Driver Parameters
Changes to the dynamic parameters take affect immediately. All LPFC dynamic
parameters are read/write using sysfs. Table 3-2 lists the dynamic FC and FCoE driver
parameters.
lpfc_use_msi When enabled, determines whether the driver uses MSI or MSI-X.
• 0 = MSI disabled; INTx mode is used (default for the FC
RHEL5.x driver).
• 1 = MSI; allows a maximum of 32 interrupts.
• 2 = MSI-X; allows a maximum of 2048 interrupts (default for
FC RHEL6.x/SLES11-SPx drivers).
Yes
Table 3-2 Dynamic FC and FCoE Driver Parameters
Parameter Description
lpfc_cr_count For LPe12000, LPe11000, and LP11000 adapters, this parameter determines
the value for I/O coalescing for lpfc_cr_count outstanding commands.
The minimum value is 1 (default). The maximum value is 255.
Note: For OneConnect and LPe16000 and LPe15000 series adapters, this
parameter is not applicable and has no effect.
lpfc_cr_delay For LPe12000, LPe11000, and LP11000 adapters, this parameter determines
the value for I/O coalescing for lpfc_cr_delay (milliseconds) outstanding
commands.
The minimum value is 0 (default). The maximum value is 63.
Note: For OneConnect and LPe16000 and LPe15000 series adapters, this
parameter is not applicable and has no effect.
lpfc_devloss_tmo Specifies the number of seconds to hold an I/O error when a device
disappears.
The minimum value is 0. The maximum value is 255. The default value is 30.
lpfc_enable_auth Specifies whether DHCHAP support is enabled. When set to 1, DHCHAP is
enabled. When set to 0, DHCHAP is disabled.
Note: This property requires a link reset to activate.
Note: This parameter is applicable to the FC RHEL5.xdriver only.
lpfc_fcp_io_channel For LPe16000 and LPe15000 series adapters using RHEL6.x/SLES11-SPx
drivers, defines the number of I/O channels supported by the driver. For
more information, see “LPFC Driver Performance Tuning” on page 865.
The default value is 4 I/O channels.
For LPe12000, LPe11000, and LP11000 adapters, and for LPe16000 and
LPe15000 series adapters using the RHEL5.x driver, this parameter is not
applicable and has no effect.
Table 3-1 Static FC and FCoE Driver Parameters (Continued)
Parameter Description
sysfs
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