[Announce] Kernel RHEL6 042stab078.22 (stable)

[Kir Kolyshkin]

OpenVZ project has released a new RHEL6 based stable kernel. Read below 
for more information. Everyone using this kernel branch is advised to 
upgrade.


Changes
=======
(since 042stab076.8)
* rebase to 2.6.32-358.6.2.el6 Red Hat kernel (security, bug fixes and 
enhancements, see below)
* implemented posix timer TID preserve support during checkpoint/restore 
(PSBM-19073)
* fixed kernel panic while resuming a Container due to an unexpected 
empty task signal handler (PSBM-19177, PCLIN-31850)
* fixed a number of issues found by Trinity test (PSBM-18611)
* eliminated a potential file system corruption by preventing pipe 
writes and fsyncs on a frozen file system. Those writes-after-freeze 
were accompanied by kernel warnings: " WARNING: at fs/ext4/super.c:248 
ext4_journal_start_sb" (PSBM-19255, PSBM-19460)
* corrected CBQ-based traffic shaping algorithm to properly limit the 
bandwidth when the limit is greater than 50% of total bandwidth (PSBM-18636)
* enhanced checkpoint functionality to operate on the systems with the 
/tmp directory mounted with the "noexec" mount option (PSBM-17995)
* fixed NFS vzquota bug that caused random memory corruptions 
(PSBM-17619, #2506)
* fixed Ubuntu 12.04 LTS syslog-ng fail to log kernel messages due to 
internal capability CAP_FS_FREEZE which was introduced in the previous 
kernel update (PSBM-17503, #2567)
* fixed a memory leak of a struct file object (PCLIN-31738)
* fixed triggering a kernel BUG() in try_to_release_page() by memory 
shrinker on an attempt to strip buffer heads from swap-backed pages 
(PCLIN-31748)
* protected the quota sync operation by a mutex, preventing possible NFS 
quota corruptions (PCLIN-31715)
* reworked fsync locking in order to prevent possible node lockups 
(PSBM-19460)
* enhanced memory management algorithm to give more priority to 
containers with unlimited memory barriers set
* fixed kernel panic on nfs unmount issued inside a container if volume 
had been mounted on a Hardware Node (PCLIN-31620)
* corrected /proc/stat:btime values on a container after live migration. 
This should also fix glitches with process start time reports (#2572)
* fixed issue when container checkpoint/restore cycle could break 
process capabilities (PSBM-18649)
* fixed issue when under certain conditions direct memory reclaiming 
could trigger fs-related activity and could cause the Node deadlock in 
case of high memory pressure (PSBM-20210)
* fixed issue when checkpointing a container with a tty under inotify 
watch could trigger a kernel panic (PCLIN-31849)
* implemented NFSv4 support inside CT, plus online migration of such CTs 
is supported now (PSBM-17798, PSBM-17795)
* ploop deltas should be opened with O_DIRECT flag, otherwise it works 
in buffered mode and might deadlock (PSBM-18642)
* ploop writeback completion should be awaited on fsync (PSBM-18049)
* introduced "cpt.suspend_timeout_sec" sysctl -- time to wait for tasks 
to be frozen (PSBM-18523)
* performance optimization in sys_fairsched_mvpr() (PCLIN-26766)
* fixed vmscan deadlock near global oom point if there are no anonymous 
pages (PCLIN-31619)
* support for ploop size > 2Tb (PSBM-15670)


Download
========
http://wiki.openvz.org/Download/kernel/rhel6/042stab078.22


Bug reporting
=============
Use http://bugzilla.openvz.org/ to report any bugs found.


Other sources of info on updates
================================
See http://wiki.openvz.org/News to view all the news (including updates)
online. There you can also find RSS feed links.


Best regards,
   OpenVZ team