3.4. Kernel-Related Updates

The CIFS client has been updated to version 1.48aRH. This is based upon the 1.48a release, with patches that apply the following changes:
- the mount option sec=none results in an anonymous mount
- CIFS now honors the umask when POSIX extensions are enabled
- fixed sec= mount options that request packet signing
Note that for users of the EMC Celerra product (NAS Code 5.5.26.x and below), the CIFS client hangs when accessing shares on EMC NAS. This issue is characterized by the following kernel messages:
```
kernel:  CIFS VFS: server not responding
kernel:  CIFS VFS: No response for cmd 162 mid 380
kernel:  CIFS VFS: RFC1001 size 135 bigger than SMB for Mid=384
```
After a CIFS mount, it becomes impossible to read/write any file on it and any application that attempts an I/O on the mountpoint will hang. To resolve this issue, upgrade to NAS Code 5.5.27.5 or later (use EMC Primus case number emc165978).
MODULE_FIRMWARE tags are now supported.
ICH9 controllers are now supported.
Greyhound processors are now supported in CPUID calls.
The getcpu system call is now supported.
Oprofile now supports new Greyhound performance counter events.
Directed DIAG is now supported to improve z/VM utilization.
The Intel graphics chipset is now supported through the DRM kernel module. Further, the DRM API has been upgraded to version 1.3 to support direct rendering.
Updates to ACPI power management have improved S3 suspend-to-RAM and S4 hibernate.