{"id":104606,"date":"2022-07-06T09:36:42","date_gmt":"2022-07-06T07:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7"},"modified":"2022-07-06T09:36:42","modified_gmt":"2022-07-06T07:36:42","slug":"dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7","title":{"rendered":"K dispoz\u00edcii s\u00fa Oracle Linux 9 a jadro Unbreakable Enterprise Kernel 7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Spolo\u010dnos\u0165 Oracle zverejnila stabiln\u00e9 verzie distrib\u00facie Oracle Linux 9 a jadra Unbreakable Enterprise Kernel 7 (UEK R7), ktor\u00e9 je navrhnut\u00e9 na pou\u017eitie v distrib\u00facii Oracle Linux ako alternat\u00edva k \u0161tandardn\u00e9mu bal\u00edku na b\u00e1ze jadra Red Hat Enterprise Linux. Distrib\u00facia Oracle Linux 9 je vytvoren\u00e1 na z\u00e1klade bal\u00edkovej z\u00e1kladne Red Hat Enterprise Linux 9 a je s \u0148ou \u00faplne bin\u00e1rne kompatibiln\u00e1.   <\/p>\n<p>Na stiahnutie s\u00fa k dispoz\u00edcii in\u0161tala\u010dn\u00e9 iso-obr\u00e1zky s ve\u013ekos\u0165ou 8,6 GB a 840 MB pre architekt\u00fary x86_64 a ARM64 (aarch64). Pre Oracle Linux 9 je otvoren\u00fd neobmedzen\u00fd a bezplatn\u00fd pr\u00edstup k yum-reposit\u00e1ru s bin\u00e1rnymi aktualiz\u00e1ciami bal\u00edkov, ktor\u00e9 opravuj\u00fa chyby (errata) a rie\u0161ia bezpe\u010dnostn\u00e9 probl\u00e9my. Na stiahnutie s\u00fa tie\u017e pripraven\u00e9 samostatne podporovan\u00e9 repozit\u00e1re so s\u00fabormi bal\u00edkov Application Stream a CodeReady Builder.      <\/p>\n<p>Okrem bal\u00edka s jadrom z RHEL (na b\u00e1ze jadra 5.14) pon\u00faka Oracle Linux vlastn\u00e9 jadro Unbreakable Enterprise Kernel 7, ktor\u00e9 je zalo\u017een\u00e9 na jadre Linux 5.15 a je optimalizovan\u00e9 na pr\u00e1cu s priemyseln\u00fdm softv\u00e9rom a hardv\u00e9rom Oracle. Zdrojov\u00e9 k\u00f3dy jadra, vr\u00e1tane jeho rozdelenia na jednotliv\u00e9 patche, s\u00fa k dispoz\u00edcii v verejnom Git-repozit\u00e1ri Oracle. Jadro Unbreakable Enterprise Kernel sa in\u0161taluje predvolene, je prezentovan\u00e9 ako alternat\u00edva k \u0161tandardn\u00e9mu bal\u00edku jadra RHEL a pon\u00faka cel\u00fd rad roz\u0161\u00edren\u00fdch funkci\u00ed, ako je integr\u00e1cia DTrace a vylep\u0161en\u00e1 podpora Btrfs. Okrem doplnkov\u00e9ho jadra maj\u00fa vydania Oracle Linux 9 a RHEL 9 \u00faplne identick\u00e9 vlastnosti (zoznam zmien si m\u00f4\u017eete pozrie\u0165 v ozn\u00e1men\u00ed RHEL9).    <\/p>\n<p>K\u013e\u00fa\u010dov\u00e9 novinky v jadre Unbreakable Enterprise Kernel 7:  <\/p>\n<ul>\n<li class=\"l\"> Vylep\u0161en\u00e1 podpora architekt\u00fary Aarch64. Ve\u013ekos\u0165 str\u00e1n pam\u00e4te na 64-bitov\u00fdch syst\u00e9moch ARM bola predvolene zn\u00ed\u017een\u00e1 z 64 KB na 4 KB, \u010do lep\u0161ie vyhovuje objemom pam\u00e4te a typom z\u00e1\u0165a\u017ee typick\u00fdm pre ARM syst\u00e9my.\n<li class=\"l\"> Pokra\u010dovala dod\u00e1vka syst\u00e9mu dynamickej ladenia DTrace 2.0, ktor\u00fd pre\u0161iel na pou\u017e\u00edvanie subsyst\u00e9mu jadra eBPF. DTrace 2.0 funguje nad eBPF, rovnako ako existuj\u00face n\u00e1stroje sledovania v Linuxe.\n<li class=\"l\"> Roz\u0161\u00edren\u00e9 mo\u017enosti FS Btrfs. V Btrfs bola pridan\u00e1 asynchr\u00f3nna implement\u00e1cia oper\u00e1cie DISCARD na ozna\u010dovanie uvo\u013enen\u00fdch blokov, ktor\u00e9 u\u017e nie je potrebn\u00e9 fyzicky uklada\u0165. Asynchr\u00f3nna implement\u00e1cia umo\u017e\u0148uje ne\u010daka\u0165 na dokon\u010denie DISCARD zo strany \u00falo\u017eiska a vykon\u00e1va\u0165 t\u00fato oper\u00e1ciu na pozad\u00ed. Bol pridan\u00fd nov\u00fd mount parameter na zjednodu\u0161enie obnovy d\u00e1t z po\u0161koden\u00e9ho FS: \u201erescue=ignorebadroots\u201c na montovanie, aj ke\u010f s\u00fa niektor\u00e9 kore\u0148ov\u00e9 stromy po\u0161koden\u00e9 (extent, uuid, data reloc, device, csum, free space), \u201erescue=ignoredatacsums\u201c na vypnutie kontroly kontroln\u00fdch s\u00fam pre d\u00e1ta a \u201erescue=all\u201c na s\u00fa\u010dasn\u00e9 zapnutie re\u017eimov \u201aignorebadroots\u2018, \u201aignoredatacsums\u2018 a \u201anologreplay\u2018. Boli vykonan\u00e9 v\u00fdznamn\u00e9 optimaliz\u00e1cie v\u00fdkonu s\u00favisiace s vykon\u00e1van\u00edm oper\u00e1ci\u00ed fsync(). Pridan\u00e1 podpora fs-verity (overovanie pravosti a integrity s\u00faborov) a porovn\u00e1vanie identifik\u00e1torov pou\u017e\u00edvate\u013eov.\n<li class=\"l\"> V XFS bola implementovan\u00e1 podpora oper\u00e1ci\u00ed DAX pre priamy pr\u00edstup k syst\u00e9mu s\u00faborov, ktor\u00fd obch\u00e1dza str\u00e1nkov\u00fa vyrovn\u00e1vaciu pam\u00e4\u0165 a vylu\u010duje dvojit\u00e9 vyrovn\u00e1vanie. Boli pridan\u00e9 zmeny na rie\u0161enie probl\u00e9mov s prete\u010den\u00edm 32-bitov\u00e9ho d\u00e1tov\u00e9ho typu time_t v roku 2038, vr\u00e1tane nov\u00fdch mo\u017enost\u00ed montovania bigtime a inobtcount.\n<li class=\"l\"> Boli vykonan\u00e9 vylep\u0161enia v s\u00faborovom syst\u00e9me OCFS2 (Oracle Cluster File System).\n<li class=\"l\"> Bola pridan\u00e1 s\u00faborov\u00fd syst\u00e9m ZoneFS, ktor\u00fd zjednodu\u0161uje n\u00edzko\u00farov\u0148ov\u00fa pr\u00e1cu so z\u00f3nov\u00fdmi \u00falo\u017en\u00fdmi zariadeniami. Z\u00f3nov\u00e9 \u00falo\u017eisk\u00e1 s\u00fa zariadenia na tvrd\u00fdch disk\u00e1ch alebo NVMe SSD, ktor\u00fdch \u00falo\u017en\u00fd priestor je rozdelen\u00fd do z\u00f3n pozost\u00e1vaj\u00facich z blokov\u00fdch skup\u00edn alebo sektorov, do ktor\u00fdch je povolen\u00e9 len sekven\u010dn\u00e9 prid\u00e1vanie \u00fadajov s celkovou aktualiz\u00e1ciou v\u0161etk\u00fdch blokov\u00fdch skup\u00edn. Syst\u00e9m s\u00faborov ZoneFS prepojuje ka\u017ed\u00fa z\u00f3nu v \u00falo\u017eisku s osobitn\u00fdm s\u00faborom, ktor\u00fd je mo\u017en\u00e9 vyu\u017ei\u0165 na ukladanie \u00fadajov v surovom re\u017eime bez manipul\u00e1cie na \u00farovni sektorov a blokov, t.j. umo\u017e\u0148uje aplik\u00e1ci\u00e1m pou\u017e\u00edva\u0165 s\u00faborov\u00e9 API namiesto priameho pr\u00edstupu k blokov\u00e9mu zariadeniu pomocou ioctl.\n<li class=\"l\"> Bola stabilizovan\u00e1 podpora protokolu <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"220\">VPN<\/a> WireGuard.\n<li class=\"l\"> Roz\u0161\u00edren\u00e9 mo\u017enosti subsyst\u00e9mu eBPF. Bol implementovan\u00fd mechanizmus CO-RE (Compile Once \u2013 Run Everywhere), ktor\u00fd rie\u0161i probl\u00e9m prenosnosti skompilovan\u00fdch eBPF programov a umo\u017e\u0148uje zbiera\u0165 k\u00f3d eBPF programov iba raz a pou\u017e\u00edva\u0165 \u0161peci\u00e1lny univerz\u00e1lny na\u010d\u00edta\u010d, ktor\u00fd prisp\u00f4sobuje na\u010d\u00edtan\u00fd program aktu\u00e1lnemu jadru a typom BTF (BPF Type Format). Pridan\u00fd mechanizmus \u201eBPF trampoline\u201c, ktor\u00fd prakticky zni\u017euje n\u00e1klady na pren\u00e1\u0161anie volan\u00ed medzi jadrom a BPF programami na nulu. Poskytnut\u00e9 mo\u017enosti priameho pr\u00edstupu k funk\u010dnosti jadra z BPF programov a pozastavenie spracovate\u013ea.\n<li class=\"l\"> Integrovan\u00fd detektor rozdelen\u00fdch z\u00e1mkov (\u201esplit lock\u201c), ktor\u00e9 vznikaj\u00fa pri pr\u00edstupe k nevyrovnan\u00fdm d\u00e1tam v pam\u00e4ti v d\u00f4sledku toho, \u017ee po\u010das vykon\u00e1vania at\u00f3movej in\u0161trukcie d\u00e1ta prech\u00e1dzaj\u00fa dvoma l\u00edniami cache CPU. Jadro m\u00f4\u017ee za behu identifikova\u0165 tak\u00e9to blok\u00e1dy, ktor\u00e9 ved\u00fa k v\u00fdrazn\u00e9mu poklesu v\u00fdkonu, a vyd\u00e1va\u0165 upozornenia alebo posiela\u0165 sign\u00e1l SIGBUS aplik\u00e1cii, ktor\u00e1 blok\u00e1du sp\u00f4sobila.\n<li class=\"l\"> Je zabezpe\u010den\u00e1 podpora Multipath TCP (MPTCP), roz\u0161\u00edrenia protokolu TCP pre organiz\u00e1ciu pr\u00e1ce TCP spojenia s dod\u00e1vkou paketov s\u00fa\u010dasne po viacer\u00fdch tras\u00e1ch cez r\u00f4zne sie\u0165ov\u00e9 rozhrania viazan\u00e9 na r\u00f4zne. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/lir\/ipv4\/\"   title=\"IP adresy\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4460\">IP adresy<\/a>.\n<li class=\"l\"> V pl\u00e1nova\u010di \u00faloh bol implementovan\u00fd re\u017eim pl\u00e1novania SCHED_CORE, ktor\u00fd umo\u017e\u0148uje spravova\u0165, ktor\u00e9 procesy m\u00f4\u017eu by\u0165 vykon\u00e1van\u00e9 spolo\u010dne na jednom jadre CPU. Ka\u017ed\u00e9mu procesu m\u00f4\u017ee by\u0165 pridelen\u00fd cookie-identifik\u00e1tor, ktor\u00fd ur\u010duje oblas\u0165 d\u00f4very medzi procesmi (napr\u00edklad pr\u00edslu\u0161nos\u0165 jedn\u00e9mu pou\u017e\u00edvate\u013eovi alebo kontajneru). Pri organiz\u00e1cii vykon\u00e1vania k\u00f3du m\u00f4\u017ee pl\u00e1nova\u010d zabezpe\u010di\u0165 zdie\u013eanie jedn\u00e9ho jadra CPU len pre procesy, ktor\u00e9 s\u00fa spojen\u00e9 s jedn\u00fdm vlastn\u00edkom, \u010do m\u00f4\u017ee by\u0165 pou\u017eit\u00e9 na blokovanie niektor\u00fdch \u00fatokov triedy Spectre t\u00fdm, \u017ee zabra\u0148uje vykon\u00e1vaniu d\u00f4veryhodn\u00fdch a ned\u00f4veryhodn\u00fdch \u00faloh v jednom vl\u00e1kne SMT (Hyper Threading).\n<li class=\"l\"> Pre cgroups bol implementovan\u00fd kontrol\u00f3r pre rozdelenie pam\u00e4te slab (slab memory controller), ktor\u00fd je zauj\u00edmav\u00fd presunom \u00fa\u010dtovania slab z \u00farovne str\u00e1n pam\u00e4te na \u00farove\u0148 objektov jadra. To umo\u017e\u0148uje zdie\u013ea\u0165 slab-strany medzi r\u00f4znymi cgroup namiesto pride\u013eovania samostatn\u00fdch slab cache pre ka\u017ed\u00fa cgroup. Navrhnut\u00fd pr\u00edstup umo\u017e\u0148uje zv\u00fd\u0161i\u0165 efekt\u00edvnos\u0165 vyu\u017e\u00edvania slab, zn\u00ed\u017ei\u0165 ve\u013ekos\u0165 pam\u00e4te vyu\u017e\u00edvanej pre slab o 30-45%, v\u00fdrazne zn\u00ed\u017ei\u0165 celkov\u00fa spotrebu pam\u00e4te jadrom a zn\u00ed\u017ei\u0165 fragment\u00e1ciu pam\u00e4te.\n<li class=\"l\"> Zabezpe\u010den\u00e9 dodanie ladac\u00edch d\u00e1t vo form\u00e1te CTF (Compact Type Format), ktor\u00fd zais\u0165uje kompaktne ulo\u017een\u00e9 inform\u00e1cie o typoch C, vz\u0165ahoch medzi funkciami a laden\u00ed symbolov.\n<li class=\"l\"> Dod\u00e1vka modulu DRBD (Distributed Replicated Block Device) a zariadenia \/dev\/raw bola ukon\u010den\u00e1 (na priamy pr\u00edstup k s\u00faborom by sa mal pou\u017ei\u0165 pr\u00edznak O_DIRECT).      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57460\">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 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430 Oracle Linux 9 \u0438 \u044f\u0434\u0440\u0430 Unbreakable Enterprise Kernel 7 (UEK R7), \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u043c\u043e\u0433\u043e \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. \u0414\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432 Oracle Linux 9 \u0441\u043e\u0437\u0434\u0430\u043d \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u0439 \u0431\u0430\u0437\u044b Red Hat Enterprise Linux 9 \u0438 \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0431\u0438\u043d\u0430\u0440\u043d\u043e \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c \u0441 [&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-104606","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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