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== Changes == | == Changes == | ||
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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. --> | |
<!-- 065.5 --> | <!-- 065.5 --> | ||
<!-- 065.6 --> | <!-- 065.6 --> | ||
<!-- 065.7 --> | <!-- 065.7 --> | ||
<!-- 067.1 --> | <!-- 067.1 --> | ||
− | * [ubc/mm] A new strict page cache isolation feature (PSBM-16955 | + | * [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 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 --> | <!-- 067.2 --> | ||
* [mm] per-bc pagecache should be shrinked proportionally now (PSBM-15799) | * [mm] per-bc pagecache should be shrinked proportionally now (PSBM-15799) | ||
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* [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] enchanted 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. | ||
+ | ** 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 | ||
<!-- 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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<!-- 068.6 --> | <!-- 068.6 --> | ||
* [mm] deadlock in kswapd near oom condition has been fixed (PSBM-17100) | * [mm] deadlock in kswapd near oom condition has been fixed (PSBM-17100) | ||
− | <!-- 068.7 | + | <!-- 068.7 --> |
− | <!-- 068.8 --> | + | * [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 --> | ||
<!-- 070.12 --> | <!-- 070.12 --> | ||
* [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) | ||
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