Red Hat ENTERPRISE LINUX 5.5 - TECHNICAL NOTES Manual page 109

* unreliable time keeping for Red Hat Enterprise Linux virtual machines. The KVM pvclock code is now
used to detect/correct lost ticks.
* /proc/cpuinfo was missing flags for new features in supported processors, possibly preventing the
operating system & applications from getting the best performance.
* reading/writing with a serial loopback device on a certain IBM system did not work unless booted
with "pnpacpi=off". (BZ#520905
* mlx4_core failed to load on systems with more than 32 CPUs.
* on big-endian platforms, interfaces using the mlx4_en driver & Large Receive Offload (LRO) did
not handle VLAN traffic properly (a segmentation fault in the VLAN stack in the kernel occurred).
678
(BZ#520908 )
* due to a lock being held for a long time, some systems may have experienced "BUG: soft lockup"
messages under heavy load.
* incorrect APIC timer calibration may have caused a system hang during boot, as well as the system
time becoming faster or slower. A warning is now provided.
* a Fibre Channel device re-scan via 'echo "---" > /sys/class/scsi_host/ host[x]/scan' may not complete
after hot adding a drive, leading to soft lockups ("BUG: soft lockup detected").
* the Broadcom BCM5761 network device could not to be initialized properly; therefore, the associated
interface could not obtain an IP address via DHCP or be assigned one manually.
* when a process attempted to read from a page that had first been accessed by writing to part of it
(via write(2)), the NFS client needed to flush the modified portion of the page out to the server, & then
read the entire page back in. This flush caused performance issues.
* a kernel panic when using bnx2x devices & LRO in a bridge. A warning is now provided to disable
LRO in these situations.
* the scsi_dh_rdac driver was updated to recognize the Sun StorageTek Flexline 380.
* in FIPS mode, random number generators are required to not return the first block of random data
they generate, but rather save it to seed the repetition check. This update brings the random number
generator into conformance.
* an option to disable/enable the use of the first random block is now provided to bring ansi_cprng into
compliance with FIPS-140 continuous test requirements.
673
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520685
674
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520686
675
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520905
677
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520906
676
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520906
678
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520908
679
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=520919
680
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521238
681
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521239
682
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521241
683
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521244
684
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=522636
685
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=523237
686
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=523289
687
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=523290
RHSA-2009:1455: Moderate security and bug fix update
673
(BZ#520685
675
)
679
(BZ#520919 )
684
(BZ#522636 )
686
(BZ#523289 )
)
(BZ#520686
(BZ#520906
(BZ#521238
(BZ#521244
687
(BZ#523290
674
)
677676
)
680
)
681
(BZ#521239 )
682
(BZ#521241
683
)
(BZ#523237
)
)
685
)
99