Release Notes

Intel - Sage Flat - ISCSI LUN is not discovered during
Red Hat Enterprise Linux 7 OS installation
Description: Installation of Red Hat Enterprise Linux 7.3 on an iSCSI LUN through Intel-X550 card fails to auto-
discover the iSCSI LUN. This leads to installation failure.
Applies to: Red Hat Enterprise Linux 7.3, 7.4, and 7.5
Cause:
dracut has mistakenly reduced the wait time to get the interface up from seven seconds to five seconds
for cases where interface shows UP but displays NO-CARRIER, for two seconds. Missing out these two
seconds, leads to dracut assuming that the interface is not connected leading to failure in LUN discovery.
Workaround: Use boot parameter rd.net.timeout.carrier=7 during installation as well as during boot.
Watchdog timer function did not work on Red Hat
Enterprise Linux 7.2
Description:
Chipset watchdog timer of Skylake DT processor is not enabled in Red Hat Enterprise Linux 7.2
Applies to: Red Hat Enterprise Linux 7.2
Cause: Red Hat Enterprise Linux 7.2 had basic enablement of Skylake DT processor. Missing device-ids are added
in Red Hat Enterprise Linux 7.3 which has complete support for Skylake DT processors.
Workaround: There is no workaround that is currently available for this issue.
Recovery is not starting on RAID 01 virtual disk when
I/Os are in progress
Description:
Create RAID 01 multiple disks (MD) array using two drives and add a hot spare to it. Then start I/O stress
using diskio tool, and during I/O, unplug one of the drives associated with MD array. Now the hot spare
must be automatically added to the array and recovery or resynchronization must start and it must not be
at a speed of 0 KB/sec. But in Red Hat Enterprise Linux 7.3 GA the speed is 0 KB/sec.
Applies to: Red Hat Enterprise Linux 7.3
Cause: MD array currently does not ever throttle filesystem I/O to make resynchronization faster, it only
throttles resynchronization to make filesystem I/O faster. This results in repeated filesystem I/O requests
to block resynchronization indefinitely. Since Diskio performs I/O at high bandwidth md has to wait until
I/O is finished. The only reliable way to make resynchronization happen faster is to reduce the filesystem
I/O load .
Workaround: There is no workaround that is currently available for this issue.
Red Hat Enterprise Linux 7.3 displays an ACPI warning
Description:
During boot to Red Hat Enterprise Linux 7.3 GA, the following kernel message is displayed in /var/log/
messages:
localhost kernel: ACPI BIOS Warning (bug):
FADT (revision 6) is longer than ACPI 5.0 version, truncating
length 276 to 268
Applies to: Red Hat Enterprise Linux 7.3
Known issues 31