{"id":76724,"date":"2020-04-04T07:42:13","date_gmt":"2020-04-04T05:42:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kompaniya-oracle-opublikovala-yadro-unbreakable-enterprise-kernel-6"},"modified":"2020-04-04T07:42:13","modified_gmt":"2020-04-04T05:42:13","slug":"kompaniya-oracle-opublikovala-yadro-unbreakable-enterprise-kernel-6","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/kompaniya-oracle-opublikovala-yadro-unbreakable-enterprise-kernel-6","title":{"rendered":"Az Oracle kiadta az Unbreakable Enterprise Kernel 6-ot.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Oracle v\u00e1llalat <noindex><a rel=\"nofollow\" href=\"https:\/\/blogs.oracle.com\/linux\/announcing-the-unbreakable-enterprise-kernel-release-6-for-oracle-linux\">bemutatta<\/a><\/noindex> els\u0151 stabil kiad\u00e1s <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oracle.com\/en\/operating-systems\/uek\/6\/relnotes6.0\/\">Unbreakable Enterprise Kernel 6<\/a><\/noindex> (UEK R6), a Linux kernel tov\u00e1bbfejlesztett verzi\u00f3ja, amely az Oracle Linux disztrib\u00faci\u00f3ban alternat\u00edvak\u00e9nt van pozicion\u00e1lva a Red Hat Enterprise Linux-b\u00f3l sz\u00e1rmaz\u00f3 hivatalos csomaggal szemben. A kernel csak x86_64 \u00e9s ARM64 (aarch64) architekt\u00far\u00e1khoz \u00e9rhet\u0151 el. A kernel forr\u00e1sk\u00f3dja, bele\u00e9rtve az egyes patch-ekre val\u00f3 bont\u00e1st, <noindex><a rel=\"nofollow\" href=\"https:\/\/oss.oracle.com\/git\/?p=linux-uek.git;a=summary\">megjelentek<\/a><\/noindex> el\u00e9rhet\u0151 az Oracle nyilv\u00e1nos Git-repository-j\u00e1ban.<\/p>\n<p>Az Unbreakable Enterprise Kernel 6 a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51881\">Linux 5.4<\/a><\/noindex> (az UEK R5 a 4.14-es kernelen alapult), amely \u00faj lehet\u0151s\u00e9gekkel, optimaliz\u00e1l\u00e1sokkal \u00e9s jav\u00edt\u00e1sokkal b\u0151v\u00fclt, valamint a legt\u00f6bb RHEL-szabv\u00e1ny\u00fa alkalmaz\u00e1ssal val\u00f3 kompatibilit\u00e1sra tesztelt\u00e9k, \u00e9s kifejezetten az Oracle ipari szoftvereivel \u00e9s hardvereivel val\u00f3 munk\u00e1ra optimaliz\u00e1lt\u00e1k. Az UEK R6 kernel telep\u00edt\u0151- \u00e9s forr\u00e1scsomagjai az Oracle Linux sz\u00e1m\u00e1ra k\u00e9sz\u00fcltek <noindex><a rel=\"nofollow\" href=\"https:\/\/yum.oracle.com\/oracle-linux-7.html\">7.x<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/yum.oracle.com\/oracle-linux-8.html\">8.x<\/a><\/noindex>. A 6.x \u00e1g t\u00e1mogat\u00e1sa megsz\u0171nt, az UEK R6 alkalmaz\u00e1s\u00e1hoz friss\u00edteni kell a rendszert Oracle Linux 7-re (nincs akad\u00e1lya ennek a kernelnek a hasonl\u00f3 RHEL, CentOS \u00e9s Scientific Linux verzi\u00f3kban val\u00f3 haszn\u00e1lat\u00e1nak). <\/p>\n<p>Kulcsok <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oracle.com\/en\/operating-systems\/uek\/6\/relnotes6.0\/uek-features-changes.html\">\u00fajdons\u00e1gok<\/a><\/noindex> Unbreakable Enterprise Kernel 6:<\/p>\n<ul>\n<li class=\"l\"> Kib\u0151v\u00edtett t\u00e1mogat\u00e1s 64 bites ARM (aarch64) architekt\u00far\u00e1val rendelkez\u0151 rendszerekhez.\n<li class=\"l\"> A Cgroup v2 \u00f6sszes funkci\u00f3j\u00e1nak t\u00e1mogat\u00e1sa megval\u00f3sult.\n<li class=\"l\"> A kernelben tal\u00e1lhat\u00f3 ktask keretrendszer megval\u00f3s\u00edtja a CPU-er\u0151forr\u00e1st jelent\u0151sen fogyaszt\u00f3 feladatok p\u00e1rhuzamos\u00edt\u00e1s\u00e1t. P\u00e9ld\u00e1ul a ktask seg\u00edts\u00e9g\u00e9vel p\u00e1rhuzamos\u00edthat\u00f3 a mem\u00f3riaoldalak takar\u00edt\u00e1sa vagy az inode lista feldolgoz\u00e1sa;\n<li class=\"l\"> A kswapd p\u00e1rhuzamos\u00edtott verzi\u00f3ja is be\u00e9p\u00edt\u00e9sre ker\u00fclt a mem\u00f3riaoldalak aszinkron helyettes\u00edt\u00e9si m\u0171veleteinek kezel\u00e9s\u00e9re, lehet\u0151v\u00e9 t\u00e9ve a k\u00f6zvetlen (szinkron) helyettes\u00edt\u00e9si m\u0171veletek sz\u00e1m\u00e1nak cs\u00f6kkent\u00e9s\u00e9t. A szabad mem\u00f3riaoldalak sz\u00e1m\u00e1nak cs\u00f6kken\u00e9sekor a kswapd beolvassa azokat a fel nem haszn\u00e1lt oldalakat, amelyeket felszabad\u00edthatunk.\n<li class=\"l\"> A kernel k\u00e9pf\u00e1jlok \u00e9s firmwarek integrit\u00e1s\u00e1nak ellen\u0151rz\u00e9s\u00e9re digit\u00e1lis al\u00e1\u00edr\u00e1s r\u00e9v\u00e9n t\u00f6rt\u00e9n\u0151 t\u00e1mogat\u00e1s megval\u00f3sult az kernel Kexec mechanizmus\u00e1nak haszn\u00e1lat\u00e1val (kernel bet\u00f6lt\u00e9se egy m\u00e1r bet\u00f6lt\u00f6tt rendszeren kereszt\u00fcl).\n<li class=\"l\"> A virtu\u00e1lis mem\u00f3ria kezel\u00e9s\u00e9nek teljes\u00edtm\u00e9nyoptimaliz\u00e1l\u00e1sa megt\u00f6rt\u00e9nt, jav\u00edtva a mem\u00f3riaoldalak \u00e9s a cache \u00fcr\u00edt\u00e9s\u00e9nek hat\u00e9konys\u00e1g\u00e1t, illetve a lefoglalt mem\u00f3riaoldalak (page faults) kezel\u00e9s\u00e9t.\n<li class=\"l\"> A NVDIMM t\u00e1mogat\u00e1sa kib\u0151v\u00fclt, a megjel\u00f6lt \u00e1lland\u00f3 mem\u00f3ria most m\u00e1r hagyom\u00e1nyos RAM-k\u00e9nt felhaszn\u00e1lhat\u00f3.\n<li class=\"l\"> A DTrace 2.0 dinamikus hibakeres\u00e9si rendszer\u00e9re val\u00f3 \u00e1tt\u00e9r\u00e9s megt\u00f6rt\u00e9nt, amely <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51287\">szabadon el\u00e9rhet\u0151v\u00e9 tettek<\/a><\/noindex> az eBPF mag alaprendszer\u00e9nek haszn\u00e1lat\u00e1hoz. A DTrace most az eBPF felett m\u0171k\u00f6dik, hasonl\u00f3an ahhoz, ahogyan a megl\u00e9v\u0151 Linux nyomk\u00f6vet\u0151 eszk\u00f6z\u00f6k is az eBPF felett m\u0171k\u00f6dnek.\n<li class=\"l\"> Fejleszt\u00e9sek t\u00f6rt\u00e9ntek az OCFS2 (Oracle Cluster File System) f\u00e1jlrendszerben.\n<li class=\"l\"> Javult a Btrfs f\u00e1jlrendszer t\u00e1mogat\u00e1sa. Lehet\u0151v\u00e9 v\u00e1lt a Btrfs alkalmaz\u00e1sa a gy\u00f6k\u00e9rpart\u00edci\u00f3kon. Az install\u00e1l\u00f3hoz hozz\u00e1adott lehet\u0151s\u00e9g, hogy a Btrfs-t v\u00e1lassz\u00e1k az eszk\u00f6z\u00f6k form\u00e1z\u00e1sakor. Lehet\u0151s\u00e9g ny\u00edlt swap f\u00e1jlok elhelyez\u00e9s\u00e9re Btrfs part\u00edci\u00f3kon. A Btrfs sz\u00e1m\u00e1ra hozz\u00e1adva a ZStandard algoritmus \u00e1ltal v\u00e9gzett t\u00f6m\u00f6r\u00edt\u00e9si t\u00e1mogat\u00e1s.\n<li class=\"l\"> Hozz\u00e1adva az aszinkron bemenet\/kimenet interf\u00e9sz\u00e9nek t\u00e1mogat\u00e1sa &#8212; io_uring, amely a bemenet\/kimenet polling t\u00e1mogat\u00e1s\u00e1val, valamint a pufferel\u00e9s \u00e9s an\u00e9lk\u00fcli m\u0171k\u00f6d\u00e9s lehet\u0151s\u00e9g\u00e9vel t\u0171nik ki. Teljes\u00edtm\u00e9ny szempontj\u00e1b\u00f3l az io_uring nagyon k\u00f6zel \u00e1ll az SPDK-hoz, \u00e9s l\u00e9nyegesen t\u00falsz\u00e1rnyalja a libaio-t a polling bekapcsolt \u00e1llapot\u00e1ban. Az io_uring v\u00e9gs\u0151 alkalmaz\u00e1sokban, amelyek felhaszn\u00e1l\u00f3i t\u00e9rben m\u0171k\u00f6dnek, a liburing k\u00f6nyvt\u00e1r biztos\u00edtja a magas szint\u0171 burkolatot a kernel interf\u00e9sz felett;\n<li class=\"l\"> Hozz\u00e1adva a t\u00e1mogat\u00e1s a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50123\">Adiantum<\/a><\/noindex> gyors adatbiztons\u00e1ghoz.\n<li class=\"l\"> Hozz\u00e1adva a t\u00f6m\u00f6r\u00edt\u00e9s t\u00e1mogat\u00e1sa a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=45058\">Zstandard<\/a><\/noindex> (zstd).\n<li class=\"l\"> Az ext4 f\u00e1jlrendszerben a szuperblokk mez\u0151kben 64 bites id\u0151b\u00e9lyegz\u0151k aktiv\u00e1lva lettek.\n<li class=\"l\"> Az XFS-be be\u00e9p\u00edtett eszk\u00f6z\u00f6k t\u00e1j\u00e9koztatj\u00e1k a f\u00e1jlrendszer integrit\u00e1s\u00e1nak \u00e1llapot\u00e1r\u00f3l a munka sor\u00e1n, \u00e9s lehet\u0151s\u00e9get adnak az fsck st\u00e1tusz\u00e1nak val\u00f3s idej\u0171 lek\u00e9rdez\u00e9s\u00e9re.\n<li class=\"l\"> A TCP-stack alap\u00e9rtelmez\u00e9s szerint az &#171; helyett &#187; modellre v\u00e1ltott &#171;As Fast As Possible&#187; a csomagok k\u00fcld\u00e9s\u00e9n\u00e9l. A UDP-hoz hozz\u00e1adva a GRO (Generic Receive Offload) t\u00e1mogat\u00e1sa. Tartalmazza a TCP-csomagok fogad\u00e1s\u00e1nak \u00e9s k\u00fcld\u00e9s\u00e9nek t\u00e1mogat\u00e1s\u00e1t zero-copy m\u00f3dban.<noindex><a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/766564\/\">Early Departure Time<\/a><\/noindex>Hozz\u00e1adva a &#171;NVMe over Fabrics TCP&#187; t\u00e1mogat\u00e1sa.\n<li class=\"l\"> A TLS protokoll kernel szint\u0171 megval\u00f3s\u00edt\u00e1sa (KTLS) mostant\u00f3l alkalmazhat\u00f3 nemcsak k\u00fcld\u00f6tt, hanem fogadott adatokra is.\n<li class=\"l\"> Az alap\u00e9rtelmezett t\u0171zfal backendk\u00e9nt a<br \/>\nnftables ker\u00fcl felhaszn\u00e1l\u00e1sra. Opcion\u00e1lisan hozz\u00e1adva a t\u00e1mogat\u00e1st a <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48117\">bpfilter.<\/a><\/noindex>.<\/p>\n<li class=\"l\"> Hozz\u00e1adva az XDP (eXpress Data Path) t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi Linux alatt a BPF programok v\u00e9grehajt\u00e1s\u00e1t a h\u00e1l\u00f3zati illeszt\u0151program szintj\u00e9n, k\u00f6zvetlen hozz\u00e1f\u00e9r\u00e9ssel a DMA csomagbufferhez \u00e9s az skbuff h\u00e1l\u00f3zati verem \u00e1tl\u00e9p\u00e9se el\u0151tt.\n<li class=\"l\"> Jav\u00edtott\u00e1k \u00e9s bekapcsolt\u00e1k az UEFI Secure Boot \u00fczemm\u00f3d haszn\u00e1latakor. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51591\">Lockdown<\/a><\/noindex>, amely korl\u00e1tozza a root felhaszn\u00e1l\u00f3 hozz\u00e1f\u00e9r\u00e9s\u00e9t a kernelhez \u00e9s blokkolja a UEFI Secure Boot elker\u00fcl\u00e9s\u00e9t. P\u00e9ld\u00e1ul lockdown m\u00f3dban korl\u00e1tozva van a hozz\u00e1f\u00e9r\u00e9s a \/dev\/mem, \/dev\/kmem, \/dev\/port, \/proc\/kcore, debugfs, kprobes hibakeres\u00e9si m\u00f3dra, mmiotrace, tracefs, BPF, PCMCIA CIS (K\u00e1rtya Inform\u00e1ci\u00f3s Strukt\u00fara), egyes ACPI interf\u00e9szekhez \u00e9s CPU MSR regiszterekhez, blokkolva vannak a kexec_file \u00e9s kexec_load h\u00edv\u00e1sok, tilos a alv\u00f3 \u00e1llapotba val\u00f3 l\u00e9p\u00e9s, a PCI eszk\u00f6z\u00f6k DMA haszn\u00e1lata korl\u00e1tozva van, tilos ACPI k\u00f3d import\u00e1l\u00e1sa EFI v\u00e1ltoz\u00f3kb\u00f3l, nem megengedett a bemeneti\/kimeneti portok manipul\u00e1l\u00e1sa, bele\u00e9rtve a megszak\u00edt\u00e1si sz\u00e1m \u00e9s a soros port bemeneti\/kimeneti portj\u00e1nak megv\u00e1ltoztat\u00e1s\u00e1t.\n<li class=\"l\"> B\u0151v\u00edtett IBRS (Enhanced Indirect Branch Restricted Speculation) utas\u00edt\u00e1sok t\u00e1mogat\u00e1sa ker\u00fclt bevezet\u00e9sre, amelyek lehet\u0151v\u00e9 teszik a spekulat\u00edv utas\u00edt\u00e1sv\u00e9grehajt\u00e1s adapt\u00edv enged\u00e9lyez\u00e9s\u00e9t \u00e9s letilt\u00e1s\u00e1t megszak\u00edt\u00e1sok, rendszerv\u00e1laszt\u00e1sok \u00e9s kontextusv\u00e1lt\u00e1sok kezel\u00e9se k\u00f6zben. Ha el\u00e9rhet\u0151 az Enhanced IBRS t\u00e1mogat\u00e1s, ez a m\u00f3dszer v\u00e9delmet ny\u00fajt a Spectre V2 oszt\u00e1ly\u00fa t\u00e1mad\u00e1sokkal szemben a Retpoline helyett, mivel jobb teljes\u00edtm\u00e9nyt biztos\u00edt.\n<li class=\"l\"> Jav\u00edtott v\u00e9delem a mindenki \u00e1ltal \u00edr\u00e1sra el\u00e9rhet\u0151 mapp\u00e1kban. Ilyen mapp\u00e1kban tilos FIFO f\u00e1jlok l\u00e9trehoz\u00e1sa \u00e9s olyan f\u00e1jlok, amelyek nem egyeznek meg a mappa tulajdonos\u00e1val, sticky z\u00e1szl\u00f3val.\n<li class=\"l\"> Alap\u00e9rtelmezetten az ARM rendszereken enged\u00e9lyezve van a kernel c\u00edmt\u00e9r randomiz\u00e1l\u00e1sa (KASLR). Az Aarch64 rendszereken enged\u00e9lyezett a mutat\u00f3k hiteles\u00edt\u00e9se.\n<li class=\"l\"> Hozz\u00e1adva a &#171;NVMe over Fabrics TCP&#187; t\u00e1mogat\u00e1sa.\n<li class=\"l\"> Bevezet\u00e9sre ker\u00fclt a virtio-pmem meghajt\u00f3, amely hozz\u00e1f\u00e9r\u00e9st biztos\u00edt a fizikai c\u00edmt\u00e9rben t\u00fckr\u00f6z\u00f6tt adatt\u00e1rol\u00f3khoz, mint p\u00e9ld\u00e1ul az NVDIMM.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52670\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Oracle \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043f\u0435\u0440\u0432\u044b\u0439 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u0432\u044b\u043f\u0443\u0441\u043a Unbreakable Enterprise Kernel 6 (UEK R6), \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u043e\u0439 \u0441\u0431\u043e\u0440\u043a\u0438 \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0435 Oracle Linux \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u044b \u0448\u0442\u0430\u0442\u043d\u043e\u043c\u0443 \u043f\u0430\u043a\u0435\u0442\u0443 \u0441 \u044f\u0434\u0440\u043e\u043c \u0438\u0437 Red Hat Enterprise Linux. \u042f\u0434\u0440\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 x86_64 \u0438 ARM64 (aarch64). \u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b \u044f\u0434\u0440\u0430, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u0440\u0430\u0437\u0431\u0438\u0432\u043a\u0443 \u043d\u0430 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0430\u0442\u0447\u0438, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0432 \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e\u043c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-76724","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Oracle 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