kernel
313
unloaded until after all guest virtual machines with assigned VFs from that SR-IOV device have
terminated. (
BZ#514360
61
)
• Under some circumstances, the sky2 driver may hang, returning the following error message:
sky2 eth<N>: receiver hang detected
Currently, the only work around to make the device online again is to reboot the system. This
bug will be repaired in an upcoming update to Red Hat Enterprise Linux 5.4.
(BZ#509891
62
,
BZ#517976)
63
• Data corruption on NFS filesystems might be encountered on network adapters without support for
error-correcting code (ECC) memory that also have TCP segmentation offloading (TSO) enabled
in the driver. Note: data that might be corrupted by the sender still passes the checksum performed
by the IP stack of the receiving machine A possible work around to this issue is to disable TSO on
network adapters that do not support ECC memory.
BZ#504811
64
• After installation, a System z machine with a large number of memory and CPUs (e.g. 16 CPU's and
200GB of memory) might may fail to IPL. To work around this issue, change the line
ramdisk=/boot/initrd-2.6.18-
<kernel-version-number>
.el5.img
to
ramdisk=/boot/initrd-2.6.18-
<kernel-version-number>
.el5.img,0x02000000
The command
zipl -V
should now show
0x02000000
as the starting address for the inital RAM
disk (initrd). Stop the logigal partiton (LPAR), and then manually increase the the storage size of the
LPAR.
• On certain hardware configurations the kernel may panic when the Broadcom iSCSI offload driver
(
bnx2i.ko
and
cnic.ko
) is loaded. To work around this do not manually load the bnx2i or cnic
modules, and temporarily disable the
iscsi
service from starting. To disable the iscsi service, run
chkconfig ---del iscsi
chkconfig ---del iscsid
On the first boot of your system, the
iscsi
service may start automatically. To bypass this, during
bootup, enter interactive start up and stop the iscsi service from starting.
• In Red Hat Enterprise Linux 5, invoking the kernel system call "setpriority()" with a "which"
parameter of type "PRIO_PROCESS" does not set the priority of child threads.
(BZ#472251)
65
• Physical CPUs cannot be safely placed offline or online when the 'kvm_intel' or 'kvm_amd' module
is loaded. This precludes physical CPU offline and online operations when KVM guests that utilize
processor virtualization support are running. It also precludes physical CPU offline and online
operations without KVM guests running when the 'kvm_intel' or 'kvm_amd' module is simply loaded
and not being used.
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