Editing Download/kernel/rhel6/042stab068.8/changes

== Changes ==
Since {{kernel link|rhel6|042stab065.3}}:
<!-- 065.4 -->
* [mm] possible memory corruption has been fixed by preventing reclaiming of pages in the writeback (PSBM-16442)
* [ploop] possible deadlock on destroying map has been fixed (PSBM-16627)
<!-- 065.5 -->
<!-- 065.6 -->
<!-- 065.7 -->
<!-- 067.1 -->
* [ubc/mm] A new strict page cache isolation feature (PSBM-16955, see [[Page cache isolation]])
<!-- 067.2 -->
* [mm] per-bc pagecache should be shrinked proportionally now (PSBM-15799)
* [mm] debug trace events has been added into shrink_zone and shrink_gang
<!-- 068.1 -->
* [dcache] introduce per-bc dcache lru lists with real time shrink. Underlying dcache can be immediately shrunk if sysctl "ubc.dcache_no_vzfs_cache" is set (PSBM-16072)
* [vSwap] virtual vSwap feature has been introduced => now vSwap does not require free physical swap on the HN (PSBM-16764)
* [pagecache] enchanted version of memory scheduler: shadow gangs, reclaimer takes timestamps into the consideration, etc. (PSBM-15796)
<!-- 068.3 -->
* [ubc/dcache] fix endless oom postponing in dcache reclaimer (PSBM-17067, PSBM-17069) 
<!-- 068.4 -->
* [mm] the number of vmscan prios has been increased from 25 to 42. vmscan iterator has been fixed. (PSBM-15799) 
<!-- 068.5 -->
* [cpt] kernel panic has been fixed due to DEAD task restoration attempt (PCLIN-30483, PSBM-17107) 
<!-- 068.6 -->
* [mm] deadlock in kswapd near oom condition has been fixed (PSBM-17100) 
<!-- 068.7 -->
* [mm] a new formula has been implemented for pagecache reclaimer, the reclaimer should become more indulgent for small Containers with old pages
** + some stats is visible now in /proc/meminfo and /proc/bc/*/meminfo in case ve.meminfo==2 (PSBM-15799) 
<!-- 068.8 --> 
* [devpts] handle dentry allocation failure properly in devpts_pty_new() ({{B|1758}})