{"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\/pt\/blog\/news\/yadro-linux-5-3-uvidelo-svet","title":{"rendered":"O kernel Linux 5.3 foi lan\u00e7ado!","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><b>Principais inova\u00e7\u00f5es<\/b><br \/>\n<noindex><\/p>\n<ul>\n<li>O mecanismo pidfd, que permite vincular um PID espec\u00edfico a um processo. O v\u00ednculo permanece ativo mesmo ap\u00f3s a finaliza\u00e7\u00e3o do processo, para que o PID possa ser atribu\u00eddo a ele em um rein\u00edcio. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/789023\/\">Detalhes<\/a>.<\/noindex>\n<\/li>\n<li>Restri\u00e7\u00f5es de faixas de frequ\u00eancia no planejador de processos. Por exemplo, processos cr\u00edticos podem ser iniciados com um limite m\u00ednimo de frequ\u00eancia (digamos, n\u00e3o inferior a 3 GHz), enquanto processos de baixa prioridade podem ser executados com um limite superior de frequ\u00eancia (por exemplo, n\u00e3o superior a 2 GHz). <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/762043\/\">Detalhes<\/a>.\n<\/li>\n<li>Suporte a GPUs da fam\u00edlia AMD Navi (RX5700) no driver amdgpu. Toda a funcionalidade necess\u00e1ria foi implementada, incluindo codifica\u00e7\u00e3o\/decodifica\u00e7\u00e3o de v\u00eddeo e gerenciamento de energia.\n<\/li>\n<li>Funcionamento completo em processadores compat\u00edveis com x86 Zhaoxin, desenvolvidos em colabora\u00e7\u00e3o entre a VIA e o governo de Xangai.\n<\/li>\n<li>Subsistema de gerenciamento de energia atrav\u00e9s da tecnologia Intel Speed Select, caracter\u00edstica de alguns processadores da fam\u00edlia Xeon. A tecnologia \u00e9 not\u00e1vel pela possibilidade de ajustes detalhados de desempenho para cada n\u00facleo da CPU.\n<\/li>\n<li>Mecanismo energeticamente eficiente para o modo de espera de processos no espa\u00e7o do usu\u00e1rio, utilizando instru\u00e7\u00f5es umwait para processadores Intel Tremont. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/790920\/\">Detalhes<\/a>.\n<\/li>\n<li>O intervalo 0.0.0.0\/8 foi autorizado para uso, proporcionando 16 milh\u00f5es de novos endere\u00e7os IPv4. <a rel=\"nofollow\" href=\"https:\/\/netdevconf.org\/0x13\/session.html?talk-ipv4-unicast-expansions\">Detalhes<\/a>.\n<\/li>\n<li>Hiper-vetor flex\u00edvel e leve ACRN, adequado para gerenciamento de sistemas IoT (Internet das Coisas). <a rel=\"nofollow\" href=\"https:\/\/projectacrn.org\/\">Detalhes<\/a>.\n<\/li>\n<\/ul>\n<p>\nA seguir, s\u00e3o listadas algumas outras altera\u00e7\u00f5es.<\/p>\n<p><b>Parte principal do n\u00facleo<\/b>\n<\/p>\n<ul>\n<li>Suporte para compress\u00e3o de firmware no formato xz, reduzindo o diret\u00f3rio \/lib\/firmware de ~420 MB para ~130 MB.\n<\/li>\n<li>Uma nova variante da chamada de sistema clone() com a capacidade de especificar um maior n\u00famero de flags. <a rel=\"nofollow\" href=\"https:\/\/lwn.net\/Articles\/792628\/\">Detalhes<\/a>.\n<\/li>\n<li>Sele\u00e7\u00e3o autom\u00e1tica de uma fonte maior para altas resolu\u00e7\u00f5es no console.\n<\/li>\n<li>Op\u00e7\u00e3o CONFIG_PREEMPT_RT, sinalizando a pr\u00f3xima integra\u00e7\u00e3o do conjunto de patches RT na ramifica\u00e7\u00e3o principal do n\u00facleo.\n<\/li>\n<\/ul>\n<p><b>Subsistema de arquivos<\/b>\n<\/p>\n<ul>\n<li>Chamadas de sistema BULKSTAT e INUMBERS para XFS v5, al\u00e9m do in\u00edcio do trabalho na implementa\u00e7\u00e3o de uma passagem em m\u00faltiplas threads pelos inodes.\n<\/li>\n<li>Btrfs agora utiliza somas de verifica\u00e7\u00e3o r\u00e1pidas (crc32c) em todas as arquiteturas.\n<\/li>\n<li>O sinal de imutabilidade \u00e9 agora rigorosamente aplicado em arquivos abertos no Ext4. O suporte a buracos em diret\u00f3rios foi implementado.\n<\/li>\n<li>O CEPH aprendeu a trabalhar com SELinux.\n<\/li>\n<li>O mecanismo smbdirect no CIFS n\u00e3o \u00e9 mais considerado experimental. Foram adicionados algoritmos criptogr\u00e1ficos para SMB3.1.1 GCM. A velocidade de abertura de arquivos foi aumentada.\n<\/li>\n<li>\u00c9 poss\u00edvel armazenar arquivos de swap no F2FS, que funcionam em modo de acesso direto. A op\u00e7\u00e3o de desabilitar o coletor de lixo est\u00e1 dispon\u00edvel com checkpoint=disable.\n<\/li>\n<li>Clientes NFS podem estabelecer v\u00e1rias conex\u00f5es TCP com o servidor usando a op\u00e7\u00e3o de montagem nconnect=X.\n<\/li>\n<\/ul>\n<p><b>Subsistema de mem\u00f3ria<\/b>\n<\/p>\n<ul>\n<li>Cada dma-buf recebe um inode completo. A partir dos diret\u00f3rios \/proc\/*\/fd e \/proc\/*\/map_files, \u00e9 poss\u00edvel obter muitos detalhes sobre o uso de buffers shmem.\n<\/li>\n<li>O mecanismo smaps exibe informa\u00e7\u00f5es individuais sobre mem\u00f3ria an\u00f4nima e compartilhada, bem como sobre o cache de arquivos no arquivo proc smaps_rollup.\n<\/li>\n<li>O uso de rbtree para swap_extent melhorou o desempenho em situa\u00e7\u00f5es de uso intensivo de swap por m\u00faltiplos processos.\n<\/li>\n<li>\/proc\/meminfo exibe o n\u00famero de p\u00e1ginas vmalloc.\n<\/li>\n<li>As capacidades da tools\/vm\/slabinfo foram ampliadas em termos de classifica\u00e7\u00e3o de caches por grau de fragmenta\u00e7\u00e3o.\n<\/li>\n<\/ul>\n<p><b>Virtualiza\u00e7\u00e3o e seguran\u00e7a<\/b>\n<\/p>\n<ul>\n<li>O driver virtio-iommu permite que dispositivos paravirtualizados enviem solicita\u00e7\u00f5es IOMMU sem a emula\u00e7\u00e3o de tabelas de endere\u00e7os.\n<\/li>\n<li>O driver virtio-pmem fornece acesso a dispositivos de armazenamento atrav\u00e9s do espa\u00e7o f\u00edsico de endere\u00e7os.\n<\/li>\n<li>Acelera\u00e7\u00e3o do acesso aos metadados para vhost. Para testes TX PPS, houve um aumento de 24% na velocidade.\n<\/li>\n<li>Para vhost_net, zerocopy est\u00e1 desabilitado por padr\u00e3o.\n<\/li>\n<li>Chaves de criptografia podem ser anexadas a namespaces.\n<\/li>\n<li>Suporte ao xxhash \u2014 um algoritmo de hash extremamente r\u00e1pido n\u00e3o criptogr\u00e1fico, cuja velocidade \u00e9 limitada apenas pelo desempenho da mem\u00f3ria.\n<\/li>\n<\/ul>\n<p><b>Subsistema de Rede<\/b>\n<\/p>\n<ul>\n<li>Suporte inicial a objetos nexthop, criados para melhorar a escalabilidade das rotas IPv4 e IPv6.\n<\/li>\n<li>O Netfilter aprendeu a descarregar a filtragem para dispositivos de acelera\u00e7\u00e3o de hardware. Suporte interno \u00e0 rastreabilidade de conex\u00f5es para pontes foi adicionado.\n<\/li>\n<li>Novo m\u00f3dulo de controle de tr\u00e1fego, permitindo manipular cabe\u00e7alhos MPLS de pacotes.\n<\/li>\n<li>O subsistema isdn4linux foi removido.\n<\/li>\n<li>Ping LE dispon\u00edvel para Bluetooth.\n<\/li>\n<\/ul>\n<p><b>Arquiteturas de hardware<\/b><\/p>\n<ul>\n<li>Novas plataformas e dispositivos ARM: Mediatek mt8183, Amlogic G12B, Kontron SMARC SoM, Google Cheza, devkit para Purism Librem5, Qualcomm Dragonboard 845c, Hugsun X99 TV Box, entre outros.\n<\/li>\n<li>Para x86, foi adicionado o mecanismo \/proc\/\/arch_status para exibir informa\u00e7\u00f5es espec\u00edficas da arquitetura, como o tempo da \u00faltima utiliza\u00e7\u00e3o do AVX512.\n<\/li>\n<li>Melhorada a performance do VMX para KVM, com uma acelera\u00e7\u00e3o de 12% na velocidade do vmexit.\n<\/li>\n<li>Inclu\u00eddas e atualizadas v\u00e1rias informa\u00e7\u00f5es sobre os processadores Intel KabyLake, AmberLake, WhiskeyLake e Ice Lake.\n<\/li>\n<li>Compress\u00e3o lzma e lzo para uImage no PowerPC.\n<\/li>\n<li>Virtualiza\u00e7\u00e3o virtio protegida para S390.\n<\/li>\n<li>Suporte a grandes p\u00e1ginas de mem\u00f3ria para RISCV.\n<\/li>\n<li>Modo de viagem no tempo para Linux em modo de usu\u00e1rio (acelera\u00e7\u00e3o e desacelera\u00e7\u00e3o do tempo).\n<\/li>\n<\/ul>\n<p><b>Drivers de dispositivos<\/b>\n<\/p>\n<ul>\n<li>Reconhecimento de metadados HDR para drivers amdgpu e i915.\n<\/li>\n<li>Extens\u00f5es de funcionalidade para os chips de v\u00eddeo Vega12 e Vega20 no amdgpu.\n<\/li>\n<li>Corre\u00e7\u00e3o de gama multissegmentar para i915, bem como desligamento ass\u00edncrono da tela e uma s\u00e9rie de novos firmwares.\n<\/li>\n<li>O driver Nouveau aprendeu a reconhecer chips da fam\u00edlia TU116.\n<\/li>\n<li>Novos protocolos Bluetooth MediaTek MT7663U e MediaTek MT7668U.\n<\/li>\n<li>Descarregamento de TLS TX HW para Infiniband, al\u00e9m de expans\u00e3o do monitoramento de hardware e temperatura.\n<\/li>\n<li>Reconhecimento de Elkhart Lake no driver HD Audio.\n<\/li>\n<li>Novos dispositivos de \u00e1udio e codecs: Conexant CX2072X, Cirrus Logic CS47L35\/85\/90, Cirrus Logic Madera, RT1011\/1308.\n<\/li>\n<li>Driver Apple SPI para teclado e trackpad.\n<\/li>\n<li>No subsistema watchdog, \u00e9 poss\u00edvel definir um limite de tempo para abrir \/dev\/watchdogN.\n<\/li>\n<li>O mecanismo de controle de frequ\u00eancia cpufreq agora suporta imx-cpufreq-dt e Raspberry Pi.\n<\/li>\n<\/ul>\n<p>Fonte: <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 \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 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\/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-10-31T19:21:56+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T19:21:56+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47O kernel Linux 5.3 foi lan\u00e7ado! | ProHoster","description":"Novidades principais: Mecanismo pidfd, que permite fixar um PID espec\u00edfico a um processo.","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/yadro-linux-5-3-uvidelo-svet","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 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