6,534
edits
Changes
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<!-- This is a merge between 068* Rebase to RHEL6.3 kernel 2.x branch and 0706.x branch32-279. 07119.1 kernel contains all patches from 068.8 el6 (security and 070.12 kernels. -->bug fixes, see link below)
** vmscan priority is calculated for all LRU vectors according to its memory usage/limit and age of LRU lists.
** sysctls:
*** vm.usage_factor (default 2)
*** vm.shadow_factor (default 8)
*** vm.age_factor (default 8)
*** priority = 12 + usage * usage_factor / limit + shadow * shadow_factor / limit (for shadow part only) + age * age_factor / max_age
* [devpts] handle dentry allocation failure properly in devpts_pty_new() ({{B|1758}})
Kir moved page Download/kernel/rhel6-testing/042stab071.2/changes to Download/kernel/rhel6-testing/042stab072.2/changes without leaving a redirect: It's 072.2 now )
== Changes ==
<!-- 071.1 is a merge between 068.8 and 070.11 kernels, adding the features of 068.8 into 070.11 kernel -->
Since {{kernel link|rhel6-testing|042stab070.11}}:
<!-- 065.5 -->
<!-- 065.6 -->
<!-- 065.7 -->
<!-- 067.1 -->
* [ubc/mm] A new strict page cache isolation feature (PSBM-16955) ** This feature disables bouncing pagecache pages between host and containers on physpages shortage in container. Internal reclaimer will drop cached data if container exceeded its physpages limit and pagecache , see [[Page cache isolation turned on.** Current state: /proc/bc/<id>/debug:pagecache_isolation (disabled by default)** sysctls:*** ubc.pagecache_isolation = 0|1 turn off|on isolation for all containers*** ubc.pagecache_isolation_on = <id> turn on for container <id> (write only)*** ubc.pagecache_isolation_off = <id> turn off for container <id> (write only]])
<!-- 067.2 -->
* [mm] per-bc pagecache should be shrinked proportionally now (PSBM-15799)
* [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)
<!-- 068.7 was a "side" kernel -->
<!-- 068.8 -->
<!-- 070.12 -->
* [fuse] a missed fuse_file_put() has been added
* [mm] a panic while using huge tables has been fixed (PSBM-17315)
<!-- 071.2 -->
* [media/rc] a possible kernel panic on "rc-core" module unload has been fixed
* [fs/epoll] spurious lockdep warnings has been eliminated
* [mm/hugepages] hugepages are now accounted inside a CT (to kmemsize and lockedpages) (PSBM-17327)
* [ubc] swap failcounters should not be incremented in case of non fatal shortage
* [mm] a new formula has been implemented for pagecache reclaimer (PSBM-15799)
* [ubc] fix BUG due to sleep-in-atomic in set_gang_limits()
* [mm] limit the CT memory portion by its commitment. In simple words: if you have single 256mb container on 1gb machine it's portion should be 256m, not 1gb.
* [mm] set commitment to 0 for unlimited containers. For vmscan priorities that means that their effective memory portion is exactly equal to memory usage and give no bonuses for eliminating penalties for aged pages.
* [cpt] make vzreboot be able to work with new vSwap implementation (without necessity of physical swap) (PSBM-17124)
* [ploop] fix lockdep complains about bd_full acquiring (PSBM-13653)
<!-- 072.1: rebase to 2.6.32-279.19.1.el6 -->
<!-- 072.2 -->
* [mm] do not force scanning top priority lru vectors, this could result into forced push anon memory to swap (PSBM-17443)
* [mm] struct gang size decreased to 16Kb, this should eliminate often memory allocation failures on CT start (PSBM-17433)
* [fs] lockdep locking classes for virtualized filesystem types has been fixed
* [fs] CT O_DIRECT and fsync settings checks have been corrected (PSBM-17157)
* [pfcache] fix using uninitialized data on pfcache mounting
=== See also ===
* {{RHSA|2012-1580}}