{"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\/pl\/blog\/news\/microsoft-realizoval-v-wsl2-windows-subsystem-for-linux-vozvrashhenie-pamyati-sisteme","title":{"rendered":"Microsoft wdro\u017cy\u0142 w WSL2 (Windows Subsystem for Linux) przywracanie pami\u0119ci systemowi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Firma Microsoft og\u0142osi\u0142a<\/a><\/noindex> o rozszerzeniu mo\u017cliwo\u015bci warstwy WSL2 (Windows Subsystem for Linux), kt\u00f3ra umo\u017cliwia uruchamianie plik\u00f3w wykonywalnych Linux w systemie Windows. W wersjach eksperymentalnych Windows Insider<\/a><\/noindex> (build 19013) w warstwie WSL2 wprowadzono wsparcie dla zwracania pami\u0119ci systemowej (Memory Reclamation), zwalnianej przez procesy dzia\u0142aj\u0105ce w \u015brodowisku opartym na j\u0105drze Linux. <\/p>\n

W przesz\u0142o\u015bci, gdy wzrasta\u0142o zu\u017cycie pami\u0119ci przez aplikacje lub j\u0105dro, pami\u0119\u0107 by\u0142a przydzielana maszynie wirtualnej WSL2, ale pozostawa\u0142a zablokowana i nie by\u0142a zwracana systemowi, nawet po zako\u0144czeniu proces\u00f3w intensywnie wykorzystuj\u0105cych zasoby i braku dalszej potrzeby na przydzielon\u0105 pami\u0119\u0107. Mechanizm odzyskiwania pami\u0119ci (Memory Reclamation) umo\u017cliwia zwracanie zwolnionej pami\u0119ci do g\u0142\u00f3wnego systemu operacyjnego oraz automatyczne zmniejszanie rozmiaru pami\u0119ci maszyny wirtualnej. Zwracana jest nie tylko pami\u0119\u0107 zwalniana przez procesy u\u017cytkownika, ale tak\u017ce pami\u0119\u0107 wykorzystywana do buforowania w j\u0105drze Linux. Na przyk\u0142ad, przy du\u017cej aktywno\u015bci dyskowej zwi\u0119ksza si\u0119 rozmiar pami\u0119ci podr\u0119cznej stron, w kt\u00f3rej osadzane s\u0105 zawarto\u015bci plik\u00f3w podczas dzia\u0142ania systemu plik\u00f3w. Po wykonaniu «echo 1 > \/proc\/sys\/vm\/drop_caches» pami\u0119\u0107 podr\u0119czn\u0105 mo\u017cna wyczy\u015bci\u0107 i zwr\u00f3ci\u0107 pami\u0119\u0107 do g\u0142\u00f3wnego systemu operacyjnego.<\/p>\n

Realizacja Memory Reclamation opiera si\u0119 na
\n\u0142atce<\/a><\/noindex>, zaproponowanej przez in\u017cynier\u00f3w Intela do w\u0142\u0105czenia do g\u0142\u00f3wnego j\u0105dra Linux w celu rozszerzenia mo\u017cliwo\u015bci sterownika virtio-balloon oraz dla systemu zarz\u0105dzania pami\u0119ci\u0105. Wskazana \u0142atka jest przeznaczona do stosowania w dowolnych systemach go\u015bcinnych w celu zwracania nieu\u017cywanych stron pami\u0119ci do systemu macierzystego i mo\u017ce by\u0107 stosowana z r\u00f3\u017cnymi hypervisorami. W przypadku WSL2 \u0142atka zosta\u0142a dostosowana do zwracania pami\u0119ci hypervisorowi Hyper-V.<\/p>\n

Przypomnijmy, \u017ce druga edycja WSL wyr\u00f3\u017cnia si\u0119<\/a><\/noindex> dostarczaj\u0105c kompletne j\u0105dro Linux zamiast emulatora, kt\u00f3ry na bie\u017c\u0105co t\u0142umaczy wywo\u0142ania systemowe Linux na wywo\u0142ania systemowe Windows. Dostarczane w WSL2 j\u0105dro Linux<\/a><\/noindex> oparte jest na wersji 4.19, kt\u00f3ra dzia\u0142a w \u015brodowisku Windows przy pomocy maszyny wirtualnej, ju\u017c stosowanej w Azure. Aktualizacje dla j\u0105dra Linux dostarczane s\u0105 za pomoc\u0105 mechanizmu Windows Update i testowane w infrastrukturze ci\u0105g\u0142ej integracji Microsoft. Stosowane w j\u0105drze specyficzne dla WSL2 \u0142atki obejmuj\u0105 optymalizacje w celu skr\u00f3cenia czasu uruchamiania j\u0105dra, zmniejszenia zu\u017cycia pami\u0119ci i pozostawienia w j\u0105drze minimalnego niezb\u0119dnego zestawu sterownik\u00f3w i podsystem\u00f3w.<\/p>\n

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

\u0179r\u00f3d\u0142o: 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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