[Announce] Kernel RHEL6 testing 042stab055.4

[Kir Kolyshkin]

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

NOTE this is a *testing* kernel, not recommended for production.


Changes
=======
(since 042stab054.5)
* rebased on 2.6.32-220.13.1.el6 RHEL6.2 kernel (security, bug fixes, 
and enhancements, see below)
* [fuse] our fuse O_DIRECT support implementation has been removed, Red 
Hat added the support
* [megaraid_sas] mask off flags in the ioctl path to prevent memory 
scribble with older MegaCLI versions (#2240)
* [atl1] kernel panic fixed in case of DMA errors
* [scheduler] warning added if huge IPI latency is detected (debug for 
PSBM-11683)
* [timer] kernel panic in timer interrupt in kexec on nodes with buggy 
BIOS fixed (PSBM-12579)
* [memory reclaimer] possibility to use sync writeback, make nodes much 
more responsive on high memory pressure (PSBM-11683, #2188)
* [oom] OOM priorities configuration has been reworked completely 
(PSBM-12263)
* [cgroups] kernel panic in devcgroup_seq_read() has been fixed (PSBM-12254)
* [cpt] task credentials fix
* [sheduler stat] /proc/uptime should now show correct idle time inside 
CT (PCLIN-30774)
* [fs] fix occasional NULL pointer dereference in show_vfsmnt() -> 
prepare_mnt_root_mangle() (PCLIN-30843, #2188#c62)
* [fs] fdatasync() optimization and statistics 
(/sys/fs/ext4/$dev/{inflight_requests,optimized_flushes}) (PSBM-12094)
* [cpt] fix locking for netfilter conntrack expectations (PSBM-12691)
* [cpt] do not try to restore CT which can't be undumped (PSBM-12693, 
possibly #2244)
* [ploop] initial (incomplete) implementation of io_kaio - ploop io 
module based on in-kernel direct aio (PCLIN-30658)
* [ploop] optimization to more effectively merge requests by converting 
bio reqs to ploop reqs earlier


Compatibility
=============
No new issues


Download
========
http://wiki.openvz.org/Download/kernel/rhel6-testing/042stab055.4


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/Atom feed links.


Best regards,
   OpenVZ team.