{"id":38149,"date":"2019-10-31T22:21:56","date_gmt":"2019-10-31T19:21:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/yadro-linux-5-3-uvidelo-svet\/"},"modified":"2019-10-31T22:21:56","modified_gmt":"2019-10-31T19:21:56","slug":"yadro-linux-5-3-uvidelo-svet","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/yadro-linux-5-3-uvidelo-svet","title":{"rendered":"J\u00e1dro Linux 5.3 spat\u0159ilo sv\u011btlo sv\u011bta!","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><b>Hlavn\u00ed novinky<\/b><br \/>\n<noindex><\/p>\n<ul>\n<li>Mechanismus pidfd, kter\u00fd umo\u017e\u0148uje p\u0159i\u0159adit konkr\u00e9tn\u00ed PID k procesu. P\u0159i\u0159azen\u00ed z\u016fst\u00e1v\u00e1 v platnosti i po skon\u010den\u00ed procesu, aby mohl b\u00fdt PID vyd\u00e1n p\u0159i jeho op\u011btovn\u00e9m spu\u0161t\u011bn\u00ed. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/789023\/\">Detaily<\/a>.<\/noindex>\n<\/li>\n<li>Omezen\u00ed frekven\u010dn\u00edch p\u00e1sem v pl\u00e1nova\u010di proces\u016f. Nap\u0159\u00edklad kritick\u00e9 procesy mohou b\u00fdt spu\u0161t\u011bny s minim\u00e1ln\u00edm prahov\u00fdm kmito\u010dtem (\u0159ekn\u011bme, minim\u00e1ln\u011b 3 GHz), zat\u00edmco n\u00edzkoprioritn\u00ed s maxim\u00e1ln\u00edm prahov\u00fdm kmito\u010dtem (nap\u0159\u00edklad maxim\u00e1ln\u011b 2 GHz). <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/762043\/\">Detaily<\/a>.\n<\/li>\n<li>Podpora grafick\u00fdch \u010dip\u016f rodiny AMD Navi (RX5700) v ovlada\u010di amdgpu. Implementov\u00e1na ve\u0161ker\u00e1 pot\u0159ebn\u00e1 funk\u010dnost, v\u010detn\u011b k\u00f3dov\u00e1n\u00ed\/de-k\u00f3dov\u00e1n\u00ed videa a spr\u00e1vy energie.\n<\/li>\n<li>Plnohodnotn\u00e1 podpora na procesorech x86-kompatibiln\u00edch Zhaoxin, vytvo\u0159en\u00fdch ve spolupr\u00e1ci mezi spole\u010dnost\u00ed VIA a vl\u00e1dou \u0160anghaje.\n<\/li>\n<li>Podsystem \u0159\u00edzen\u00ed energie podle technologie Intel Speed Select, charakteristick\u00e9 pro n\u011bkter\u00e9 procesory rodiny Xeon. Technologie je pozoruhodn\u00e1 mo\u017enost\u00ed detailn\u00edho nastaven\u00ed v\u00fdkonu pro ka\u017ed\u00e9 j\u00e1dro CPU.\n<\/li>\n<li>Energeticky efektivn\u00ed mechanismus pohotovostn\u00edho re\u017eimu proces\u016f v u\u017eivatelsk\u00e9m prostoru, kter\u00fd vyu\u017e\u00edv\u00e1 instrukce umwait pro procesory Intel Tremont. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/790920\/\">Detaily<\/a>.\n<\/li>\n<li>Byl povolen k pou\u017eit\u00ed rozsah 0.0.0.0\/8, co\u017e poskytuje 16 milion\u016f nov\u00fdch IPv4 adres. <a rel=\"nofollow\" href=\"https:\/\/netdevconf.org\/0x13\/session.html?talk-ipv4-unicast-expansions\">Detaily<\/a>.\n<\/li>\n<li>Flexibiln\u00ed lehk\u00fd hypervisor ACRN, velmi vhodn\u00fd pro spr\u00e1vu syst\u00e9m\u016f IoT (internet v\u011bc\u00ed). <a rel=\"nofollow\" href=\"https:\/\/projectacrn.org\/\">Detaily<\/a>.\n<\/li>\n<\/ul>\n<p>\nN\u00ed\u017ee jsou uvedeny n\u011bkter\u00e9 dal\u0161\u00ed zm\u011bny.<\/p>\n<p><b>Hlavn\u00ed \u010d\u00e1st j\u00e1dra<\/b>\n<\/p>\n<ul>\n<li>Podpora komprese firmware do xz form\u00e1tu, co\u017e umo\u017e\u0148uje zmen\u0161it adres\u00e1\u0159 \/lib\/firmware z ~420 MB na ~130 MB.\n<\/li>\n<li>Nov\u00e1 varianta syst\u00e9mov\u00e9ho vol\u00e1n\u00ed clone() s mo\u017enost\u00ed nastavit v\u011bt\u0161\u00ed po\u010det p\u0159\u00edznak\u016f. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/792628\/\">Detaily<\/a>.\n<\/li>\n<li>Automatick\u00fd v\u00fdb\u011br v\u011bt\u0161\u00edho p\u00edsma pro vysok\u00e1 rozli\u0161en\u00ed v konzoli.\n<\/li>\n<li>Mo\u017enost CONFIG_PREEMPT_RT, znamenaj\u00edc\u00ed brzkou integraci sady RT patch\u016f do hlavn\u00ed v\u011btve j\u00e1dra.\n<\/li>\n<\/ul>\n<p><b>Souborov\u00fd subsystem<\/b>\n<\/p>\n<ul>\n<li>Syst\u00e9mov\u00e1 vol\u00e1n\u00ed BULKSTAT a INUMBERS pro XFS v5, tak\u00e9 byla zah\u00e1jena pr\u00e1ce na implementaci multithreaded proch\u00e1zen\u00ed inod\u016f.\n<\/li>\n<li>Btrfs nyn\u00ed pou\u017e\u00edv\u00e1 rychl\u00e9 kontroln\u00ed sou\u010dty (crc32c) na v\u0161ech architektur\u00e1ch.\n<\/li>\n<li>Na otev\u0159en\u00e9 soubory v Ext4 je nyn\u00ed striktn\u011b aplikov\u00e1n p\u0159\u00edznak nem\u011bnnosti (immutable). Byla implementov\u00e1na podpora d\u011br (holes) v adres\u00e1\u0159\u00edch.\n<\/li>\n<li>CEPH se nau\u010dila pracovat s SELinux.\n<\/li>\n<li>Mechanismus smbdirect v CIFS ji\u017e nen\u00ed pova\u017eov\u00e1n za experiment\u00e1ln\u00ed. P\u0159id\u00e1ny kryptografick\u00e9 algoritmy pro SMB3.1.1 GCM. Zrychleno otev\u00edr\u00e1n\u00ed soubor\u016f.\n<\/li>\n<li>Na F2FS lze um\u00edstit swapov\u00e9 soubory, kter\u00e9 pracuj\u00ed v re\u017eimu p\u0159\u00edm\u00e9ho p\u0159\u00edstupu. Mo\u017enost zak\u00e1zat sb\u011bra\u010d nevyu\u017eit\u00fdch blok\u016f p\u0159i checkpoint=disable.\n<\/li>\n<li>Klienti NFS mohou okam\u017eit\u011b vytvo\u0159it n\u011bkolik TCP p\u0159ipojen\u00ed k serveru pomoc\u00ed mo\u017enosti montov\u00e1n\u00ed nconnect=X.\n<\/li>\n<\/ul>\n<p><b>Pam\u011b\u0165ov\u00fd subsyst\u00e9m<\/b>\n<\/p>\n<ul>\n<li>Ka\u017ed\u00e9mu dma-buf je p\u0159id\u011blen kompletn\u00ed inod. Z adres\u00e1\u0159\u016f \/proc\/*\/fd a \/proc\/*\/map_files lze z\u00edskat mnoho podrobn\u00fdch informac\u00ed o vyu\u017eit\u00ed buffer\u016f shmem.\n<\/li>\n<li>Mechanismus smaps zobrazuje samostatn\u00e9 informace o anonymn\u00ed a sd\u00edlen\u00e9 pam\u011bti, stejn\u011b jako o souborov\u00e9m cache v proc-souboru smaps_rollup.\n<\/li>\n<li>Pou\u017eit\u00ed rbtree pro swap_extent zv\u00fd\u0161ilo v\u00fdkon za podm\u00ednek intenzivn\u00edho vyu\u017e\u00edv\u00e1n\u00ed swapu mnoha procesy.\n<\/li>\n<li>V \/proc\/meminfo se zobrazuje po\u010det str\u00e1nek vmalloc.\n<\/li>\n<li>Mo\u017enosti tools\/vm\/slabinfo byly roz\u0161\u00ed\u0159eny o t\u0159\u00edd\u011bn\u00ed cache podle \u00farovn\u011b fragmentace.\n<\/li>\n<\/ul>\n<p><b>Virtualizace a bezpe\u010dnost<\/b>\n<\/p>\n<ul>\n<li>Ovlada\u010d virtio-iommu pro paravirtualizovan\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 umo\u017e\u0148uje pos\u00edlat po\u017eadavky IOMMU bez emulace tabulek adres.\n<\/li>\n<li>Ovlada\u010d virtio-pmem pro p\u0159\u00edstup k \u00falo\u017ei\u0161t\u00edm p\u0159es fyzick\u00fd prostor adres.\n<\/li>\n<li>Zrychlen\u00ed p\u0159\u00edstupu k metadat\u016fm pro vhost. Pro TX PPS testy ukazuj\u00ed n\u00e1r\u016fst rychlosti o 24%.\n<\/li>\n<li>Pro vhost_net je v\u00fdchoz\u00ed nastaveno zak\u00e1zat zerocopy.\n<\/li>\n<li>\u0160ifrovac\u00ed kl\u00ed\u010de lze p\u0159i\u0159adit ke jmenn\u00fdm prostor\u016fm.\n<\/li>\n<li>Podpora xxhash \u2014 velmi rychl\u00e9ho ne-kryptografick\u00e9ho hashovac\u00edho algoritmu, jeho\u017e rychlost je omezena pouze v\u00fdkonem pam\u011bti.\n<\/li>\n<\/ul>\n<p><b>S\u00ed\u0165ov\u00e1 subsyst\u00e9m<\/b>\n<\/p>\n<ul>\n<li>Po\u010d\u00e1te\u010dn\u00ed podpora nexthop objekt\u016f, vytvo\u0159en\u00fdch pro zlep\u0161en\u00ed \u0161k\u00e1lovatelnosti tras IPv4 a IPv6.\n<\/li>\n<li>Netfilter se nau\u010dil uvol\u0148ovat filtrov\u00e1n\u00ed na hardwarov\u00e1 akcelera\u010dn\u00ed za\u0159\u00edzen\u00ed. P\u0159id\u00e1na vestav\u011bn\u00e1 podpora sledov\u00e1n\u00ed spojen\u00ed pro mosty.\n<\/li>\n<li>Nov\u00fd modul pro kontrolu provozu, kter\u00fd umo\u017e\u0148uje manipulaci s MPLS hlavi\u010dkami paket\u016f.\n<\/li>\n<li>Subsystem isdn4linux byl odstran\u011bn.\n<\/li>\n<li>K dispozici jsou LE pings pro Bluetooth.\n<\/li>\n<\/ul>\n<p><b>Hardwarov\u00e9 architektury<\/b><\/p>\n<ul>\n<li>Nov\u00e9 ARM platformy a za\u0159\u00edzen\u00ed: Mediatek mt8183, Amlogic G12B, Kontron SMARC SoM, Google Cheza, devkit pro Purism Librem5, Qualcomm Dragonboard 845c, Hugsun X99 TV Box a dal\u0161\u00ed.\n<\/li>\n<li>Pro x86 byl p\u0159id\u00e1n mechanismus \/proc\/\/arch_status pro zobrazen\u00ed architektu\u0159e specifick\u00fdch informac\u00ed, jako je \u010das posledn\u00edho pou\u017eit\u00ed AVX512.\n<\/li>\n<li>Optimalizov\u00e1n v\u00fdkon VMX pro KVM, rychlost vmexit byla zv\u00fd\u0161ena o 12%.\n<\/li>\n<li>P\u0159id\u00e1ny a aktualizov\u00e1ny r\u016fzn\u00e9 informace o procesorech Intel KabyLake, AmberLake, WhiskeyLake a Ice Lake.\n<\/li>\n<li>Kompresn\u00ed lzma a lzo pro uImage na PowerPC.\n<\/li>\n<li>Ochr\u00e1n\u011bn\u00e1 virtio virtualizace pro S390.\n<\/li>\n<li>Podpora velk\u00fdch pam\u011b\u0165ov\u00fdch str\u00e1nek pro RISCV.\n<\/li>\n<li>Re\u017eim \u010dasov\u00e9ho cestov\u00e1n\u00ed pro User-mode Linux (zpomalov\u00e1n\u00ed a zrychlov\u00e1n\u00ed \u010dasu).\n<\/li>\n<\/ul>\n<p><b>Ovlada\u010de za\u0159\u00edzen\u00ed<\/b>\n<\/p>\n<ul>\n<li>Rozpozn\u00e1v\u00e1n\u00ed HDR metadat pro ovlada\u010de amdgpu a i915.\n<\/li>\n<li>Roz\u0161\u00ed\u0159en\u00ed funkcionality pro grafick\u00e9 \u010dipy Vega12 a Vega20 v amdgpu.\n<\/li>\n<li>Multisegmentn\u00ed gama korekce pro i915, stejn\u011b jako asynchronn\u00ed vypnut\u00ed nap\u00e1jen\u00ed obrazovky a \u0159ada nov\u00fdch firmwar\u016f.\n<\/li>\n<li>Grafick\u00fd ovlada\u010d Nouveau se nau\u010dil rozpozn\u00e1vat \u010dipy rodiny TU116.\n<\/li>\n<li>Nov\u00e9 Bluetooth protokoly MediaTek MT7663U a MediaTek MT7668U.\n<\/li>\n<li>Vylo\u017een\u00ed TLS TX HW pro Infiniband, stejn\u011b jako roz\u0161\u00ed\u0159en\u00ed hardware a teplotn\u00edho monitorov\u00e1n\u00ed.\n<\/li>\n<li>Rozpozn\u00e1v\u00e1n\u00ed Elkhart Lake v ovlada\u010di HD Audio.\n<\/li>\n<li>Nov\u00e1 zvukov\u00e1 za\u0159\u00edzen\u00ed a kodeky: Conexant CX2072X, Cirrus Logic CS47L35\/85\/90, Cirrus Logic Madera, RT1011\/1308.\n<\/li>\n<li>Ovlada\u010d Apple SPI pro kl\u00e1vesnici a touchpad.\n<\/li>\n<li>V subsyst\u00e9mu watchdog lze nastavit maxim\u00e1ln\u00ed \u010das pro otev\u0159en\u00ed \/dev\/watchdogN.\n<\/li>\n<li>Mechanismus \u0159\u00edzen\u00ed frekvence cpufreq z\u00edskal podporu imx-cpufreq-dt a Raspberry Pi.\n<\/li>\n<\/ul>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/kernel\/15227621\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0413\u043b\u0430\u0432\u043d\u044b\u0435 \u043d\u043e\u0432\u0448\u0435\u0441\u0442\u0432\u0430 \u041c\u0435\u0445\u0430\u043d\u0438\u0437\u043c pidfd, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0437\u0430\u043a\u0440\u0435\u043f\u0438\u0442\u044c \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u044b\u0439 PID \u0437\u0430 \u043a\u0430\u043a\u0438\u043c-\u043b\u0438\u0431\u043e \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u043c. \u0417\u0430\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u0442\u044c \u0438 \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, \u0447\u0442\u043e\u0431\u044b PID \u043c\u043e\u0436\u043d\u043e \u0431\u044b\u043b\u043e \u0432\u044b\u0434\u0430\u0442\u044c \u0435\u043c\u0443 \u043f\u0440\u0438 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u043c \u0437\u0430\u043f\u0443\u0441\u043a\u0435. \u041f\u043e\u0434\u0440\u043e\u0431\u043d\u043e\u0441\u0442\u0438. \u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u043d\u044b\u0445 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u043e\u0432 \u0432 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u044b \u043c\u043e\u0436\u043d\u043e \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u0441 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u044b\u043c \u043f\u043e\u0440\u043e\u0433\u043e\u043c \u0447\u0430\u0441\u0442\u043e\u0442\u044b (\u0441\u043a\u0430\u0436\u0435\u043c, \u043d\u0435 \u043c\u0435\u043d\u0435\u0435 3 \u0413\u0413\u0446), \u0430 \u043d\u0438\u0437\u043a\u0440\u043e\u043f\u0440\u0438\u043e\u0440\u0438\u0442\u0435\u0442\u043d\u044b\u0435 \u2014 \u0441 \u0432\u0435\u0440\u0445\u043d\u0438\u043c \u043f\u043e\u0440\u043e\u0433\u043e\u043c \u0447\u0430\u0441\u0442\u043e\u0442\u044b [&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-38149","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=\"\u0413\u043b\u0430\u0432\u043d\u044b\u0435 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