{"id":74853,"date":"2020-03-21T08:42:40","date_gmt":"2020-03-21T05:42:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/linux-kernel-5-6-chto-zhdat-v-novoj-versii-yadra"},"modified":"2020-03-21T08:42:40","modified_gmt":"2020-03-21T05:42:40","slug":"linux-kernel-5-6-chto-zhdat-v-novoj-versii-yadra","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/administrirovanie\/linux-kernel-5-6-chto-zhdat-v-novoj-versii-yadra","title":{"rendered":"Linux kernel 5.6 \u2014 hvad kan vi forvente i den nye kernelversion","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Udgivelsen af Linux kernel 5.6 er planlagt til slutningen af marts. I vores dagens artikel diskuterer vi de kommende \u00e6ndringer \u2014 det nye filsystem, WireGuard-protokollen og opdateringer af drivere.<\/p>\n

\"Linux<\/a><\/noindex><\/a><\/noindex>
\nFoto \u2014 lucas huffman<\/a><\/noindex> \u2014 Unsplash<\/i><\/p>\n

Den l\u00e6nge ventede VPN-protokol<\/h2>\n

\nDavid Miller, som har ansvaret for Linux-netv\u00e6rkssystemet, har besluttet at inkludere<\/a><\/noindex> WireGuard i kernen. Det er en VPN-tunnel udviklet af IT-sikkerhedsfirmaet Edge Security. Ideen blev diskuteret<\/a><\/noindex> for to \u00e5r siden \u2014 dengang blev den st\u00f8ttet<\/a><\/noindex> af Linus Torvalds selv \u2014 men implementeringen blev udsat. Projektet var st\u00e6rkt bundet til kryptofunktionerne fra Edge Security. Men for et halvt \u00e5r siden gik forfatterne af den nye protokol p\u00e5 kompromis og skiftede<\/a><\/noindex> til den underst\u00f8ttede Crypto API fra kernen.<\/p>\n

Der er mening<\/a><\/noindex>, at WireGuard i fremtiden vil kunne erstatte OpenVPN. If\u00f8lge testene<\/a><\/noindex>, er det nye protokols b\u00e5ndbredde fire gange h\u00f8jere end OpenVPN: 1011 Mbit\/s mod 258 Mbit\/s. Men det skal bem\u00e6rkes her, at overgangen til den almindelige Crypto API kan forringe pr\u00e6stationen.<\/p><\/blockquote>\n

\nEn anden funktion ved WireGuard er, at den ikke afbryder forbindelsen<\/a><\/noindex>, selv hvis brugeren f\u00e5r en ny IP-adresse, og h\u00e5ndterer ruteproblemer selv. Til disse form\u00e5l knyttes en privat n\u00f8gle til hver netv\u00e6rksinterface. Den genereres ved hj\u00e6lp af the Diffie-Hellman protocol<\/a><\/noindex>. Selve krypteringen er baseret<\/a><\/noindex> p\u00e5 ChaCha20 og algoritmen Poly1305<\/a><\/noindex>. De betragtes som forbedrede alternativer til AES-256-CTR og HMAC<\/a><\/noindex>.<\/p>\n

Det nye filsystem<\/h2>\n

\nDette system, blevet<\/a><\/noindex> Zonefs, blev pr\u00e6senteret af ingeni\u00f8rerne fra Western Digital. Det er designet til at arbejde med zonerede lagringsenheder (zoned storage<\/a><\/noindex>). Det er bloklagermedier, hvis adresseomr\u00e5der er opdelt i zoner (for eksempel NVMe SSD). Filsystemet g\u00f8r det muligt at behandle hver zone som en fil \u2014 det vil sige, at man bruger specialiserede API'er i stedet for ioctl<\/a><\/noindex> til at f\u00e5 adgang til datalagre. En tilsvarende tilgang anvendes i databaser som RocksDB og LevelDB. Det g\u00f8r det muligt at reducere omkostningerne ved kodeoverf\u00f8rsel, der oprindeligt er tilpasset til at arbejde med filer.<\/p>\n

I Linux er der allerede en funktion til interaktion med bloklagringsenheder. I kerneversion 4.13 opdateret med<\/a><\/noindex> modulet dm-zoned. Det pr\u00e6senterer den zonerede lagerenhed som en almindelig bloklagringsenhed, mens Zonefs vil blive en alternativ l\u00f8sning.<\/p>\n

\"Linux
\nFoto \u2014 Suzan Kir\u0161i\u0107<\/a><\/noindex> \u2014 Unsplash<\/i><\/p>\n

Udover introduktionen af det nye filsystem har udviklerne i Linux-kernen foretaget \u00e6ndringer i de eksisterende. Der blev er tilf\u00f8jet<\/a><\/noindex> komprimeringsmekanismer LZO<\/a><\/noindex>\/LZ4<\/a><\/noindex> For F2FS, their support will remain experimental for now. It will need to be enabled manually during the partition mounting process (option compress_algorithm<\/i>). There\u2019s also an upgrade et nyt flag PR_SPEC_DISABLE_NOEXEC, som deaktiverer beskyttelsen mod s\u00e5rbarheden Spectre v4 i alle datterprocesser, der k\u00f8res p\u00e5 serveren. Det er relateret til funktionen<\/a><\/noindex> EXT4\u2014it is linked to direct input\/output operations. The update package was presented by IBM engineer Ritesh Harjan. According to him<\/a><\/noindex>, in some cases the patch can improve filesystem performance by 140%.<\/p>\n

Driver updates<\/h2>\n

\nA new driver will appear in the core cpuidle_cooling<\/i>. Its task<\/a><\/noindex> is to cool the CPU\/SoC by embedding idle cycles during operation. In some ways, it is similar to the PowerClamp driver for Intel processors, but not tied to a specific architecture. The system har udgivet<\/a><\/noindex> is developed by specialists from Linaro, who are engaged in optimizing open-source software for ARM platforms.<\/p>\n

Derudover Support for GeForce 20 series (TU10x) graphics cards will be added. The respective driver was developed by Ben Skeggs from the Nouveau project. Unfortunately, GeForce 16 (TU11x) will remain 'off the table' for now. Nvidia has not provided the necessary firmware images for initializing the card. Also, the new graphics cards under Linux may face performance issues due to the lack of reclocking\u2014automatic frequency management. In the past, it has been established that Nouveau drivers<\/a><\/noindex> may operate 20-30% slower than the originals.<\/a><\/noindex> Andrew Abbate<\/p>\n

\"Linux
\nFoto \u2014 The new kernel<\/a><\/noindex> \u2014 Unsplash<\/i><\/p>\n

will support USB4. The relevant changes<\/a><\/noindex> were made by engineers from Intel. They modified the existing codebase related to Thunderbolt\u2014this is about two thousand lines. blev bedt om<\/a><\/noindex> Of course, these aren\u2019t all the updates that will arrive in the core, for example,<\/p>\n

you can expect support for additional peripherals and network devices. Also, kernel 5.6 will be the first 32-bit kernel to<\/a><\/noindex> address the 2038 problem.<\/a><\/noindex> At the end of January, engineers<\/a><\/noindex>made final changes to nfsd, xfs, alsa, and v4l2. They hope that in the eighteen remaining years, users and developers of distributions will manage to switch to kernel 5.6 (or its subsequent versions).<\/a><\/noindex> Related materials from the corporate blog 1cloud.ru:<\/p>\n

Most supercomputers operate under Linux\u2014discussing the situation<\/b><\/p>\n

\"Linux How to secure a Linux system: 10 tips<\/a><\/noindex>
\n\"Linux What we write about on Habr:<\/a><\/noindex><\/p>\n

Analyzing recommendations for personal data protection and information security\u2014what to pay attention to<\/b><\/p>\n

\"Linux .<\/a><\/noindex>
\n\"Linux For f\u00f8rste gang teleporterede man et foton fra en chip til en anden<\/a><\/noindex>
\n\"Linux Hvordan IT-sektoren hj\u00e6lper verden med at kaste mindre mad v\u00e6k<\/a><\/noindex><\/p><\/blockquote>\n

Kilde: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412\u044b\u0445\u043e\u0434 Linux kernel 5.6 \u043d\u0430\u043c\u0435\u0447\u0435\u043d \u043d\u0430 \u043a\u043e\u043d\u0435\u0446 \u043c\u0430\u0440\u0442\u0430. \u0412 \u043d\u0430\u0448\u0435\u043c \u0441\u0435\u0433\u043e\u0434\u043d\u044f\u0448\u043d\u0435\u043c \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0435 \u043e\u0431\u0441\u0443\u0436\u0434\u0430\u0435\u043c \u0433\u0440\u044f\u0434\u0443\u0449\u0438\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u2014 \u043d\u043e\u0432\u0443\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443, \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b WireGuard \u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u043e\u0432. \u0424\u043e\u0442\u043e \u2014 lucas huffman \u2014 Unsplash \u0414\u043e\u043b\u0433\u043e\u0436\u0434\u0430\u043d\u043d\u044b\u0439 VPN-\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b \u0414\u044d\u0432\u0438\u0434 \u041c\u0438\u043b\u043b\u0435\u0440 (David Miller), \u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0439 \u0437\u0430 \u0441\u0435\u0442\u0435\u0432\u0443\u044e \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0443 Linux, \u0440\u0435\u0448\u0438\u043b \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 WireGuard. \u042d\u0442\u043e \u2014 VPN-\u0442\u0443\u043d\u043d\u0435\u043b\u044c, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0439 \u0432 \u0418\u0411-\u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Edge Security. […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":74854,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-74853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Linux kernel 5.6 \u2013 hvad skal man forvente i den nye version af kernen | ProHoster","description":"Udgivelsen af Linux kernel 5.6 er planlagt til slutningen af 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