{"id":52100,"date":"2019-10-31T00:00:00","date_gmt":"2019-10-30T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/microsoft-realizoval-v-wsl2-windows-subsystem-for-linux-vozvrashhenie-pamyati-sisteme"},"modified":"2020-02-18T13:59:46","modified_gmt":"2020-02-18T10:59:46","slug":"microsoft-realizoval-v-wsl2-windows-subsystem-for-linux-vozvrashhenie-pamyati-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/microsoft-realizoval-v-wsl2-windows-subsystem-for-linux-vozvrashhenie-pamyati-sisteme","title":{"rendered":"Microsoft har implementeret hukommelsesretur til systemet i WSL2 (Windows Subsystem for Linux)","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Microsoft har annonceret<\/a><\/noindex> om udvidelsen af WSL2 (Windows Subsystem for Linux), der muligg\u00f8r k\u00f8rsel af Linux eksekverbare filer i Windows. I eksperimentelle builds Windows Insider<\/a><\/noindex> (build 19013) i WSL2-laget er der kommet st\u00f8tte til tilbagelevering af hukommelse (Memory Reclamation), der frig\u00f8res af processer, der k\u00f8rer i Linux-kernes milj\u00f8. <\/p>\n

Tidligere, hvis applikationer eller kernen kr\u00e6vede mere hukommelse, blev hukommelsen tildelt WSL2 virtuelle maskine, men forblev derefter fastl\u00e5st og blev ikke returneret til systemet, selv efter afslutningen af ressourcetunge processer og frav\u00e6ret af yderligere behov for den tildelte hukommelse. Memory Reclamation-mekanismen g\u00f8r det muligt at returnere frigivet hukommelse til hoved-OS'et og automatisk reducere st\u00f8rrelsen p\u00e5 den virtuelle maskine. Her returneres ikke kun hukommelsen, der frigives fra brugerprocesser, men ogs\u00e5 hukommelsen, der anvendes til caching i Linux-kernen. For eksempel, ved h\u00f8j diskaktivitet \u00f8ges st\u00f8rrelsen p\u00e5 sidecache, hvor indholdet af filer gemmes under arbejdet med FS. Efter at have k\u00f8rt 'echo 1 > \/proc\/sys\/vm\/drop_caches' kan cachen ryddes, og hukommelsen returneres til hoved-OS'et.<\/p>\n

Implementeringen af Memory Reclamation er baseret p\u00e5
\nen patch<\/a><\/noindex>, foresl\u00e5et af ingeni\u00f8rer fra Intel til at blive inkluderet i hoved Linux-kernen med det form\u00e5l at udvide funktionaliteten af virtio-balloon driveren og hukommelsesstyringssystemet. Den n\u00e6vnte patch er beregnet til at blive brugt i enhver g\u00e6stebaseret system for at returnere ubrugte hukommelsessider til v\u00e6rtsystemet og kan anvendes med forskellige hypervisorer. I tilf\u00e6lde af WSL2 er patchen tilpasset til at returnere hukommelse til Hyper-V hypervisoren.<\/p>\n

Lad os huske, at den anden version af WSL adskiller sig<\/a><\/noindex> leverer et fuldt Linux-kernel i stedet for en emulator, der omdanner Linux systemopkald til Windows systemopkald i realtid. Den kernel, der leveres i WSL2 Linux-kernen<\/a><\/noindex> er baseret p\u00e5 version 4.19, som k\u00f8rer i Windows-milj\u00f8et ved hj\u00e6lp af en virtuel maskine, der allerede anvendes i Azure. Opdateringer til Linux-kernen leveres gennem Windows Update mekanismen og testes i Microsofts kontinuerlige integrationsinfrastruktur. De specifikke patches til WSL2-kernen inkluderer optimeringer for at reducere opstartstiden for kernen, mindske hukommelsesforbruget og efterlade et minimalt n\u00f8dvendigt s\u00e6t af drivere og subsystemer i kernen.<\/p>\n

<\/a><\/noindex><\/p>\n

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

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Microsoft \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438 WSL2 (Windows Subsystem for Linux), \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0439 \u0437\u0430\u043f\u0443\u0441\u043a \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 Linux \u0432 Windows. \u0412 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 Windows Insider (build 19013) \u0432 \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0435 WSL2 \u043f\u043e\u044f\u0432\u0438\u043b\u0430\u0441\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 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