{"id":35395,"date":"2019-10-31T22:04:04","date_gmt":"2019-10-31T19:04:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-operatsionnoj-sistemy-dragonfly-bsd-5-6\/"},"modified":"2019-10-31T22:04:04","modified_gmt":"2019-10-31T19:04:04","slug":"reliz-operatsionnoj-sistemy-dragonfly-bsd-5-6","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/reliz-operatsionnoj-sistemy-dragonfly-bsd-5-6","title":{"rendered":"Udgivelse af operativsystemet DragonFly BSD 5.6","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"http:\/\/www.dragonflybsd.org\/release56\/\">Tilg\u00e6ngelig<\/a><\/noindex>  udgivelse <noindex><a rel=\"nofollow\" href=\"http:\/\/www.dragonflybsd.org\/\">DragonFlyBSD 5.6<\/a><\/noindex>, et operativsystem med hybridkerne, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=2717\">skabt<\/a><\/noindex> i 2003 med det form\u00e5l at tilbyde en alternativ udvikling af FreeBSD 4.x-grenen. Blandt kendetegnene ved DragonFly BSD kan n\u00e6vnes det distribuerede versionskontrolsystem <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.opennet.ru\/HAMMER\">HAMMER<\/a><\/noindex>, underst\u00f8ttelse af indl\u00e6sning af &#171;virtuelle&#187; kerner i systemet som brugerprocesser, muligheden for caching af data og metadata p\u00e5 SSD-diske, der tager h\u00f8jde for kontekstuelle variant- symboliske links, muligheden for at fryse processer med henblik p\u00e5 at bevare deres tilstand p\u00e5 disken, et hybridkerne, der anvender letv\u00e6gtsstr\u00f8mme (LWKT). <\/p>\n<p>Vigtige <noindex><a rel=\"nofollow\" href=\"http:\/\/www.dragonflybsd.org\/release56\/\">forbedringer<\/a><\/noindex>, tilf\u00f8jet i DragonFlyBSD 5.6:\n<\/p>\n<ul>\n<li class=\"l\"> Systemet til styring af virtuel hukommelse er blevet opgraderet. Mange af subsystemerne relateret til virtuel hukommelse og PMAP er blevet omskrevet.<br \/>\nI mange steder er koden blevet fri for l\u00e5sninger, herunder i funktionerne m_page_wakeup, vm_hold og vm_unhold. Effektiviteten af processor cache er forbedret ved at reducere migrationen af VM-objekter mellem CPU-kerner og ved at minimere overhead ved behandling af undtagelser (page-fault) for delte hukommelsesomr\u00e5der. Algoritmen til tildeling af hukommelsessider er forbedret. Der er elimineret forsinkelser i funktionen vm_page_alloc(). API'en vm_page_hash*() er blevet tilf\u00f8jet, som muligg\u00f8r adgang uden l\u00e5sninger.<\/p>\n<p>Som resultater er det lykkedes at m\u00e6rkbart <noindex><a rel=\"nofollow\" href=\"http:\/\/lists.dragonflybsd.org\/pipermail\/users\/2019-June\/358196.html\">\u00f8ge ydeevnen<\/a><\/noindex>. For eksempel,<br \/>\ni buildkernel-testen er udf\u00f8relsestiden for kerneoperationer reduceret med 40%. Kapaciteten er steget med 7% ved brug af Haswell CPU-familien og med 14% for Xeon. I SELF-EXEC S\/DI-testen sammenlignet med den tidligere version er der registreret et ydeevneforbedring p\u00e5 23% for Haswell og 18% for Xeon. I testen<br \/>\nSELF-EXEC S\/SH henholdsvis 28% og 71%, i SELF-EXEC D\/DI \u2014 23% og 242% (takket v\u00e6re forbedret multitasking), i SELF-EXEC D\/SH p\u00e5 24% og 234%, i FAULTZF p\u00e5 17% og 14%, i DOCOMP p\u00e5 22% og 42%,<br \/>\ni NATIVEKERNEL p\u00e5 5.1% og 8.1%;<\/p>\n<li class=\"l\"> DRM-driveren og TTM-hukommelsesstyringsmodulet for AMD-grafikkort er blevet betydeligt opdateret. Underst\u00f8ttelse af nye APU Ryzen er blevet tilf\u00f8jet. Underst\u00f8ttelsen af UEFI framebuffer er forbedret. I radeon\/ttm er en negativt p\u00e5virkende gensidig l\u00e5sning blevet elimineret. Load-timing er blevet refaktoreret for at undg\u00e5 konflikter mellem i915-driveren og X-serveren. DRM_IOCTL_GET_PCIINFO er blevet tilf\u00f8jet for at forbedre underst\u00f8ttelsen af mesa\/libdrm. Mange fejl og mangler er blevet udbedret;\n<li class=\"l\"> Koden til synkronisering i HAMMER2-filsystemet er blevet omskrevet, hvilket har betydet en betydelig forbedring af ydeevnen for dette FS. Desuden er ydeevnen ved sekventiel skrivning blevet forbedret.<br \/>\nFor increased crash resilience, dependency tracking has been added to prevent the splitting of directories\/files during create, rename, or delete operations. The snapshot handling code has been reworked to reduce delays and ensure snapshot consistency. Improved handling of concurrent write operations and cache flushing to disk. Enhanced implementation of the umount operation. Increased informativeness of integrity violation messages (CRC error).<\/p>\n<p>HAMMER2 is recommended as the default root file system. Clustering support is currently unavailable. The HAMMER2 file system is notable for features such as separate mounting of snapshots, writable snapshots, directory-level quotas, incremental mirroring, support for various data compression algorithms, and multi-master mirroring with data distribution across multiple hosts. <\/p>\n<li class=\"l\"> Initial support for the FUSE subsystem for creating file systems in user space has been added.\n<li class=\"l\"> Performance of the PF packet filter on multi-core systems has been increased.\n<li class=\"l\"> Support for SMAP (Supervisor Mode Access Prevention) and SMEP (Supervisor Mode Execution Prevention) protection mechanisms has been implemented where supported by the CPU. SMAP prevents privileged code running in kernel mode from accessing user space data. SMEP stops transitions from kernel mode to executing user-level code, which helps block the exploitation of many kernel vulnerabilities (shell code will not execute as it resides in user space).\n<li class=\"l\"> Kode til at blokere  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50684\">angreb<\/a><\/noindex> klassen MDS (Microarchitectural Data Sampling) i Intel-processorer. For at det skal fungere, kr\u00e6ves der opdateret mikrokode. Som standard er beskyttelsen deaktiveret og aktiveres via 'sysctl machdep.mds_mitigation=MD_CLEAR'. Aktivering medf\u00f8rer en ekstra forsinkelse p\u00e5 niveau med 250ns ved kontekstskift mellem bruger- og kernelrum;\n<li class=\"l\"> The kernel is built by default with retpoline protection against Spectre attacks.\n<li class=\"l\"> Many utilities from the base system have been transitioned to use LibreSSL.\n<li class=\"l\"> Updated versions of third-party components, including xz 5.2.4,<br \/>\n    libarchive 3.3.3, libressl 2.9.1, openssh 8.0, ldns 1.7.0,<br \/>\nlibedit 2019-03-24. Components evdev, makefs, ministat, and libfetch have been transferred from FreeBSD.<br \/>\nFra OpenBSD er systemopkald som reallocarray(), timing_safe*(), freezero(), dup3(), recallocarray(), aligned_alloc(), explicit_bzero() blevet overf\u00f8rt til libc. Som standard bruges gcc-8 i stedet for gcc-5 til opbygning.<\/p>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50887\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 DragonFlyBSD 5.6, \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0441 \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u044b\u043c \u044f\u0434\u0440\u043e\u043c, \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u043e\u0439 \u0432 2003 \u0433\u043e\u0434\u0443 \u0441 \u0446\u0435\u043b\u044c\u044e \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u044f \u0432\u0435\u0442\u043a\u0438 FreeBSD 4.x. \u0418\u0437 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 DragonFly BSD \u043c\u043e\u0436\u043d\u043e \u0432\u044b\u0434\u0435\u043b\u0438\u0442\u044c \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u043e\u043d\u043d\u0443\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 HAMMER, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 &#171;\u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445&#187; \u044f\u0434\u0435\u0440 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u0430\u043a \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u043c\u0435\u0442\u0430-\u0434\u0430\u043d\u043d\u044b\u0445 \u0424\u0421 \u043d\u0430 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f\u0445, \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u044e\u0449\u0438\u0435 \u043a\u043e\u043d\u0442\u0435\u043a\u0441\u0442 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0441\u044b\u043b\u043a\u0438, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043c\u043e\u0440\u043e\u0437\u043a\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 [&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-35395","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=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 DragonFlyBSD 5.6, \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/da\/blog\/news\/reliz-operatsionnoj-sistemy-dragonfly-bsd-5-6\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" 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