Editing Download/kernel/rhel6-testing/042stab056.5/changes

== Changes ==
Since {{kernel link|rhel6-testing|042stab056.2}}:
* [ext4] memory leak of biovecs has been fixed (PSBM-13208)
* [ubc] UB maxvalue is shown as "inf" now instead of "9223372036854775807" (on Alt+SysRQ+m)
* [ubc] a lot of internal enhancements/rework in ubc and memory reclaimer code
* [ubc/debug] total count of pruned dentries is shown in /proc/bc/id/debug:dcache_pruned
* [ubc] empty/non-regular shmem inodes are accounted into kmemsize as well (debug for PCLIN-30869)
* [ploop] free blocks discard has been optimized to remove large extents only in case it's enough for freeing asked amount of disk
* [ext4] additional sanity checks has been added to prevent crash on a corrupted fs (PSBM-12241)
* [vzwdog] vzwdog prints now max sched and alloc latencies additionally for the whole sleep period
* [cpt] correct traced processes handling behavior during the checkpoint (PSBM-13065)
* [cpt] correct vzctl hang in case "init" process has died during the restore process (PCLIN-30886)
* [fuse] pending requests queue is flushed at the very end now to make sure it will stay empty
* [fuse] support for file holes in case of writeback enabled has been added (PSBM-13216)
* [fuse] API for userspace reconnecting has been added
* [fairsched] make processes be able to set realtime priority in CT0, this makes pltp testcase happy (PCLIN-29945)
* [ploop] prohibit ploop mounting over ext3, only support ext4 ({{B|2281}}, PSBM-13225)
* [perf/debug] perf tool is now able to collect D-state statistics (PCLIN-30022)
* [kmemleak/debug] make kmemleak be able to work with our kernel (kmemleak is available in debug kernels only)
* [ovs] add Open vSwitch support to the kernel. Support is still incomplete, ovz is disabled in kernel config by default (PSBM-12955, PSBM-12605)