Linux on System z Current & Future Technology - z/VM - IBM
Linux on System z Current & Future Technology - z/VM - IBM
Linux on System z Current & Future Technology - z/VM - IBM
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<strong>IBM</strong> <str<strong>on</strong>g>Linux</str<strong>on</strong>g> and <strong>Technology</strong> CenterKernel news – Comm<strong>on</strong> code<str<strong>on</strong>g>Linux</str<strong>on</strong>g> versi<strong>on</strong> 3.0 (2011-07-21)– New kernel versi<strong>on</strong> numbering scheme– Cleancache (was transcendent memory)support for ext4, btrfs and XFS– Preemptible mmu_gather for reducedlatency– Enhancements for the memory cgroupc<strong>on</strong>troller<str<strong>on</strong>g>Linux</str<strong>on</strong>g> versi<strong>on</strong> 3.1 (2011-10-24)– New architecture: OpenRISC– Dynamic writeback throttling– Slab allocator speedups– VFS scalability improvements– New iSCSI implementati<strong>on</strong>– Software RAID: Bad block management<str<strong>on</strong>g>Linux</str<strong>on</strong>g> versi<strong>on</strong> 3.2 (2012-01-04)– New architecture: Hexag<strong>on</strong>– btrfs improvements:• faster scrubbing• automatic backup of tree roots– ext4: support for bigger block sizesup to 1MB– Process bandwidth c<strong>on</strong>troller– I/O-less dirty throttling• reduce file system write-backfrom page reclaim– TCP Proporti<strong>on</strong>al Rate Reducti<strong>on</strong>30© 2012 <strong>IBM</strong> Corporati<strong>on</strong>
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