Red Hat ENTERPRISE 5.4 RELEASE NOTES, Руководство пользователя

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Chapter 1. Package Updates
128
• Support for the
FIEMAP
file extent mapping system has been included in this kernel update.
(
BZ#296951
905
)
• The
ext4
file system code (included in Red Hat Enterprise Linux as a Technology Preview) was
rebased for this release. (
BZ#485315
906
)
• This kernel update corrects performance issues with the Common Internet File System (
CIFS
)
(a protocol that defines a standard for remote file access) including difficulties mounting certain
Windows file systems or symlink files. (
BZ#465143
907
)
• Kernel support for the
XFS
high-performance file system has been added to this Red Hat Enterprise
Linux release. In this initial implementation the functionality is limited to specific customers on a use-
case basis.(
BZ#470845
908
)
• This release includes kernel support for the
FUSE
userspace file system. (
BZ#457975
909
)
• Tunable parameters that control the number of
NFSD
socket connections have been added to this
kernel release. TCP connections have previously been capped at 80, regardless of the number of
NFS threads that were open. (
BZ#468092
910
)
• This kernel update includes
FIEMAP
support for ]
GFS2
(Global FIle System). (
BZ#476626
911
)
• This kernel update adds a
UUID
(Universal Unique IDentifier) field to the file system super block.
(
BZ#242696
912
)
• This update includes a patch to allow access to files on a
GFS2
file system from client machines
running the older (and previously incompatible) NFS v2 file sharing protocol. (
BZ#497954
913
)
1.110.9.5. Networking
Kernel updates that relate to Networking issues
• A new module has been added to this kernel version to enable
DSCP
(Differentiated Services Code
Point) setting in systems using IPv6 netfilter. (
BZ#481652
914
)
• In order to boost virtualization performance on 10 Gigabyte Ethernet cards (and 10GbE
performance in general), Generic Receive Offload (GRO) support (analogous to GSO support on
egress) has been added to the IPv4 and IPv6 protocols in this kernel release. (
BZ#499347
915
)
• This kernel update includes new code to improve UDP port randomization. Previous versions of
the randomization code could allow a security weakness by providing sub-optimal randomizing, as
well as producing CPU drag while scanning for port numbers. This update corrects these behaviors.
(
BZ#480951
916
)
• When using
setsockopt()
with option
IPV6_MULTICAST_IF
and
optval
set
to
0
, the previous kernel would return a result of
ENODEV
. This release updates
setsockopt(IPV6_MULTICAST_IF)
to report the correct value and not the error. (
BZ#484971
917
)
• This update includes numerous critical fixes for the NetXen device driver. These patches have been
tested and implemented in the kernel upstream. A complete list of the changes and their effects can
be found at
BZ#485381
918
.
1.110.9.6. General Platform Support
Platform support updates: