[Announce] Kernel RHEL6 042stab063.2 (moved to stable)

[Kir Kolyshkin]

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


Changes
=======
Since 042stab062.2:
Rebase to 2.6.32-279.11.1.el6 RHEL6.3 kernel (security and bug fixes, 
see RHSA-2012-1366)
[netfilter] iptables inability to handle > 2000 rules inside 32bit CT on 
64bit node (PCLIN-31246)
[cpuinfo] cpuflags are reported empty inside a CT on a node with single 
physical cpu. In particular this breaks yum (#2373)
[cpt] fix raising kernel BUG() on cpt/rst of a ptraced task
[cpt/delayfs] NFS remote locks handling has been fixed (PSBM-14815)
[fairsched] a lot of scheduler enhancements mostly intended to improve 
performance on NUMA nodes, now tries to run CT processes on no more than 
vcpus configured for the CT (PSBM-14332)
[framebuffer] Draw Parallels logo if node is booted in graphical mode 
and "psbm" kernel boot option is provided (PSBM-15257)
[debug] added the ability to dump slab entries
[mm debug] added an ability to catch double free in per-cpu page lists. 
Triggers BUG() if double free detected.
[net] netlink messages handling code has been fixed (env context 
corrected). In particular this fixes network configuration using Network 
Manager (#2353, #2354)
[fuse] trim 'count' of bytes to read to avoid reading beyond eof when 
racing with writeback (PSBM-15340)
[fuse] one more race fixed in writeback (PSBM-15008)
[cpt] ipv6 module detection error message has been improved
[cpt] online migration failure between 2 nodes without ipv6 modules 
loaded/enabled has been fixed (PSBM-15431)
[cpt] fixed tty struct leak (PSBM-15373)
[mm] new sysctl has been introduced: vm.strict_mem_cpuset (=0 by 
default). If 0, mem cpuset will work as a hint, i.e. if allocation from 
allowed NUMA nodes fails, cpuset constraints will be ignored (PSBM-15613)
[ploop] hang on fsync() on ro mount has been fixed (PSBM-15435)
[fuse] a page-cache corruption has been eliminated
[kstat] fixed a kernel panic due to cpu hard lockup caused by a deadlock 
in gathering statistics code (PCLIN-31259)
[ubc/mm] a special hack for restricting backup tools and preventing 
cache thrashing. Container with CTID of /proc/sys/ubc/tools_bcid is 
marked so that CT reclaimer will not move its pages to HN inactive list 
once they were reclaimed in the CT. This should prevent backup from 
trashing HN cache (PSBM-15797)
[tty] BUG_ON from n_tty_read() has been removed (mainstream patch 
backport). This is not a real fix, but thus we eliminate the panic (#2381)
[sunrpc] destroy virtuzalized data moved to khelper, this eliminates 
possible fail to stop a CT with kernel workqueue (rpciod) in D state 
(PSBM-15630)
[oom_score_adj] fix printing of oom_score_adj (PSBM-15718)
[oom_score_adj] set a minimum adjustment for "init", it should be killed 
last in CT (PSBM-15718)
[ubc/dcache] postpone oom if dcache still shrinkable (if dcache 
reclaimer reports real or possible future progress). Plus, show amount 
of currenly unused dcache entries in /proc/bc/$BCID/debug (PCLIN-31294)
[cpt/delayfs] show hidden fs type instead of hardcoded "delayfs". New 
NFS utils become very clever on umount - they check whether mount point 
information in /proc/mounts suits some NFS-mount rules. In particular 
this fixes a failures on CT stop with NFS volume mounted inside 
(PCLIN-31282)
[fuse] fixed one more page-cache corruption by fuse (If a page is under 
fuse-writeback now, fuse_launder_page() must wait on its completion)
[fairsched] since now we boost throttled tasks on wakeups (in kernel) 
and throttle them only when switching to userspace. This should 
eliminate priority inversion issues (PSBM-15441)
[ploop/pstorage] failed mount file system after snapshot creation for 
RAW ploop fixed (PSBM-15643)
[drbd] driver updated up to version 8.3.13. Sources were taken from 
vendor git (#2254)
[fairsched] do not account io-throttled tasks in loadavg
[ploop] prevent using logic of reallocation for raw images (it's only 
suitable for expanded images) (PSBM-15793)
[cpt/posix_timers] overrun counter migration support added (PSBM-15580, 
#2324)


Download
========
http://wiki.openvz.org/Download/kernel/rhel6/042stab063.2


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