Red Hat ENTERPRISE LINUX 5.5 - S 2010, Руководство пользователя

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kernel
315
Important
Turning NUMA reclaim negatively effects the overall throughput of the system.
(BZ#507360)
70
• Configuring IRQ SMP affinity has no effect on some devices that use message signalled interrupts
(MSI) with no MSI per-vector masking capability. Examples of such devices include
Broadcom
NetXtreme
Ethernet devices that use the
bnx2
driver.
If you need to configure IRQ affinity for such a device, disable MSI by creating a file in
/etc/
modprobe.d/
containing the following line:
options bnx2 disable_msi=1
Alternatively, you can disable MSI completely using the kernel boot parameter
pci=nomsi
.
(BZ#432451)
71
• The
smartctl
tool cannot properly read SMART parameters from SATA devices.
(BZ#429606)
72
•
IBM T60
laptops will power off completely when suspended and plugged into a docking station. To
avoid this, boot the system with the argument
acpi_sleep=s3_bios
.
(BZ#439006)
73
• The
QLogic iSCSI Expansion Card
for the
IBM Bladecenter
provides both ethernet and iSCSI
functions. Some parts on the card are shared by both functions. However, the current
qla3xxx
and
qla4xxx
drivers support ethernet and iSCSI functions individually. Both drivers do not support the
use of ethernet and iSCSI functions simultaneously.
Because of this limitation, successive resets (via consecutive
ifdown
/
ifup
commands) may hang
the device. To avoid this, allow a 10-second interval after an
ifup
before issuing an
ifdown
. Also,
allow the same 10-second interval after an
ifdown
before issuing an
ifup
. This interval allows
ample time to stabilize and re-initialize all functions when an
ifup
is issued.
(BZ#276891)
74
• Laptops equipped with the
Cisco Aironet MPI-350
wireless may hang trying to get a DHCP address
during any network-based installation using the wired ethernet port.
To work around this, use local media for your installation. Alternatively, you can disable the wireless
card in the laptop BIOS prior to installation (you can re-enable the wireless card after completing the
installation).
(BZ#213262)
75
• Hardware testing for the
Mellanox MT25204
has revealed that an internal error occurs under certain
high-load conditions. When the
ib_mthca
driver reports a catastrophic error on this hardware, it is
usually related to an insufficient completion queue depth relative to the number of outstanding work
requests generated by the user application.
Although the driver will reset the hardware and recover from such an event, all existing connections
at the time of the error will be lost. This generally results in a segmentation fault in the user
application. Further, if
opensm
is running at the time the error occurs, then you need to manually
restart it in order to resume proper operation.
(BZ#251934)
76