{"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\/sk\/blog\/news\/microsoft-realizoval-v-wsl2-windows-subsystem-for-linux-vozvrashhenie-pamyati-sisteme","title":{"rendered":"Microsoft implementoval v WSL2 (Windows Subsystem for Linux) vr\u00e1tenie pam\u00e4te syst\u00e9mu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Spolo\u010dnos\u0165 Microsoft vyhl\u00e1sila<\/a><\/noindex> o roz\u0161\u00edren\u00ed mo\u017enost\u00ed vrstvy WSL2 (Windows Subsystem for Linux), ktor\u00e1 umo\u017e\u0148uje sp\u00fa\u0161\u0165anie spustite\u013en\u00fdch s\u00faborov Linuxu vo Windows. V experiment\u00e1lnych zostav\u00e1ch Windows Insider<\/a><\/noindex> (build 19013) vo vrstve WSL2 sa objavila podpora pre vr\u00e1tenie syst\u00e9movej pam\u00e4te (Memory Reclamation), uvo\u013enenej procesmi be\u017eiacimi v prostred\u00ed zalo\u017eenom na jadre Linux. <\/p>\n

Predt\u00fdm, ak aplik\u00e1cie alebo jadro zvy\u0161ovali spotrebu pam\u00e4te, pam\u00e4\u0165 bola pridelen\u00e1 virtu\u00e1lnemu stroju WSL2, ale po tom zost\u00e1vala priraden\u00e1 a nebola vracan\u00e1 syst\u00e9mu ani po ukon\u010den\u00ed n\u00e1ro\u010dn\u00e9ho procesu a absencii \u010fal\u0161ej potreby po pridelen\u00ed pam\u00e4te. Mechanizmus Memory Reclamation umo\u017e\u0148uje vraca\u0165 uvo\u013enen\u00fa pam\u00e4\u0165 do hlavn\u00e9ho OS a automaticky zmen\u0161ova\u0165 ve\u013ekos\u0165 pam\u00e4te virtu\u00e1lneho stroja. Pri tom sa vracia nielen pam\u00e4\u0165, ktor\u00fa uvo\u013enili pou\u017e\u00edvate\u013esk\u00e9 procesy, ale aj pam\u00e4\u0165 pou\u017eit\u00e1 na vyrovn\u00e1vaciu pam\u00e4\u0165 v jadre Linux. Napr\u00edklad pri vysokej diskovej aktivite sa zvy\u0161uje ve\u013ekos\u0165 str\u00e1nkov\u00e9ho vyrovn\u00e1vacieho pam\u00e4te, v ktorom sa uchov\u00e1va obsah s\u00faborov po\u010das pr\u00e1ce s FS. Po vykonan\u00ed «echo 1 > \/proc\/sys\/vm\/drop_caches» m\u00f4\u017ee by\u0165 vyrovn\u00e1vacia pam\u00e4\u0165 vymazan\u00e1 a pam\u00e4\u0165 vr\u00e1ten\u00e1 do hlavn\u00e9ho OS.<\/p>\n

Realiz\u00e1cia Memory Reclamation je zalo\u017een\u00e1 na
\npatchi<\/a><\/noindex>, ktor\u00fd navrhli in\u017einieri Intel na zaradenie do hlavn\u00e9ho jadra Linux s cie\u013eom roz\u0161\u00edri\u0165 mo\u017enosti ovl\u00e1da\u010da virtio-balloon a syst\u00e9mu spr\u00e1vy pam\u00e4te. Uveden\u00fd patch je ur\u010den\u00fd na pou\u017eitie v ak\u00fdchko\u013evek hos\u0165ovac\u00edch syst\u00e9moch na vr\u00e1tenie nevyu\u017eit\u00fdch str\u00e1n pam\u00e4te hostite\u013esk\u00e9mu syst\u00e9mu a m\u00f4\u017ee sa pou\u017ei\u0165 s r\u00f4znymi hyperv\u00edzormi. V pr\u00edpade WSL2 je patch prisp\u00f4soben\u00fd na vracanie pam\u00e4te hyperv\u00edzoru Hyper-V.<\/p>\n

Pripom\u00edname, \u017ee druh\u00e1 verzia WSL sa l\u00ed\u0161i<\/a><\/noindex> je dodan\u00e1 s plnohodnotn\u00fdm jadrom Linux namiesto emul\u00e1tora, ktor\u00fd na\u017eivo konvertuje syst\u00e9mov\u00e9 volania Linuxu na syst\u00e9mov\u00e9 volania Windows. Dod\u00e1van\u00e9 v WSL2 jadro Linux<\/a><\/noindex> je zalo\u017een\u00e9 na vydan\u00ed 4.19, ktor\u00e9 be\u017e\u00ed v prostred\u00ed Windows prostredn\u00edctvom virtu\u00e1lneho stroja, u\u017e aplikovan\u00e9ho v Azure. Aktualiz\u00e1cie pre jadro Linux sa dod\u00e1vaj\u00fa prostredn\u00edctvom mechanizmu Windows Update a testuj\u00fa sa v infra\u0161trukt\u00fare kontinu\u00e1lnej integr\u00e1cie Microsoft. Pou\u017e\u00edvan\u00e9 v jadre \u0161pecifick\u00e9 pre WSL2 patche zah\u0155\u0148aj\u00fa optimaliz\u00e1cie na skr\u00e1tenie \u010dasu spustenia jadra, zn\u00ed\u017eenie spotreby pam\u00e4te a zachovanie v jadre minim\u00e1lne potrebn\u00e9ho s\u00faboru ovl\u00e1da\u010dov a subsyst\u00e9mov.<\/p>\n

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

Zdroj: 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 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u0430\u043c\u044f\u0442\u0438 (Memory Reclamation), \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0430\u0435\u043c\u043e\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430\u043c\u0438, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u043c\u0438 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u043d\u0430 \u0431\u0430\u0437\u0435 \u044f\u0434\u0440\u0430 Linux. \u0420\u0430\u043d\u0435\u0435 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u0440\u043e\u0441\u0442\u0430 \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f\u043c\u0438 \u0438\u043b\u0438 \u044f\u0434\u0440\u043e\u043c, \u043f\u0430\u043c\u044f\u0442\u044c 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