Difference between revisions of "Download/kernel/rhel6-testing/042stab072.2/changes"

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m (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 ))
 
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== Changes ==
 
== Changes ==
−
This is a merge between 068.8 and 070.11 kernels, adding the features of 068.8 into 070.11 kernel.
+
<!-- 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}}:
 
Since {{kernel link|rhel6-testing|042stab070.11}}:
−
<!-- This is a merge between 068.x branch and 070.x branch. 071.1 kernel contains all patches from 068.8 and 070.12 kernels. -->
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* Rebase to RHEL6.3 kernel 2.6.32-279.19.1.el6 (security and bug fixes, see link below)
 
<!-- 065.5 -->
 
<!-- 065.5 -->
 
<!-- 065.6 -->
 
<!-- 065.6 -->
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* [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)
 
* [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)
 
* [vSwap] virtual vSwap feature has been introduced => now vSwap does not require free physical swap on the HN (PSBM-16764)
−
* [pagecache] enhanced version of memory scheduler: shadow gangs, reclaimer takes timestamps into the consideration, etc. (PSBM-15796)
+
* [pagecache] enchanted version of memory scheduler: shadow gangs, reclaimer takes timestamps into the consideration, etc. (PSBM-15796)
−
** vmscan priority is calculated for all LRU vectors according to its memory usage/limit and age of LRU lists.
 
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** sysctls:
 
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*** vm.usage_factor  (default 2)
 
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*** vm.shadow_factor (default 8)
 
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*** vm.age_factor    (default 8)
 
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*** priority = 12 + usage * usage_factor / limit + shadow * shadow_factor / limit (for shadow part only) + age * age_factor / max_age
 
 
<!-- 068.3 -->
 
<!-- 068.3 -->
 
* [ubc/dcache] fix endless oom postponing in dcache reclaimer (PSBM-17067, PSBM-17069)  
 
* [ubc/dcache] fix endless oom postponing in dcache reclaimer (PSBM-17067, PSBM-17069)  
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* [fuse] a missed fuse_file_put() has been added
 
* [fuse] a missed fuse_file_put() has been added
 
* [mm] a panic while using huge tables has been fixed (PSBM-17315)
 
* [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}}

Latest revision as of 23:14, 24 December 2012

Changes[edit]

Since 042stab070.11:

  • Rebase to RHEL6.3 kernel 2.6.32-279.19.1.el6 (security and bug fixes, see link below)
  • [ubc/mm] A new strict page cache isolation feature (PSBM-16955, see Page cache isolation)
  • [mm] per-bc pagecache should be shrinked proportionally now (PSBM-15799)
  • [mm] debug trace events has been added into shrink_zone and shrink_gang
  • [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)
  • [ubc/dcache] fix endless oom postponing in dcache reclaimer (PSBM-17067, PSBM-17069)
  • [mm] the number of vmscan prios has been increased from 25 to 42. vmscan iterator has been fixed. (PSBM-15799)
  • [cpt] kernel panic has been fixed due to DEAD task restoration attempt (PCLIN-30483, PSBM-17107)
  • [mm] deadlock in kswapd near oom condition has been fixed (PSBM-17100)
  • [fuse] a missed fuse_file_put() has been added
  • [mm] a panic while using huge tables has been fixed (PSBM-17315)
  • [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)
  • [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[edit]

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