{"id":39372,"date":"2019-10-31T22:31:20","date_gmt":"2019-10-31T19:31:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-yadre-linux-prekrashhaetsya-podderzhka-32-razryadnyh-gostevyh-sistem-xen-v-rezhime-paravirtualizatsii\/"},"modified":"2019-10-31T22:31:20","modified_gmt":"2019-10-31T19:31:20","slug":"v-yadre-linux-prekrashhaetsya-podderzhka-32-razryadnyh-gostevyh-sistem-xen-v-rezhime-paravirtualizatsii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/v-yadre-linux-prekrashhaetsya-podderzhka-32-razryadnyh-gostevyh-sistem-xen-v-rezhime-paravirtualizatsii","title":{"rendered":"V j\u00e1dru Linuxu kon\u010d\u00ed podpora 32bitov\u00fdch hostitelsk\u00fdch syst\u00e9m\u016f Xen v re\u017eimu paravirtualizace","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V experiment\u00e1ln\u00ed v\u011btvi j\u00e1dra Linux, v r\u00e1mci kter\u00e9 se p\u0159ipravuje vyd\u00e1n\u00ed 5.4, byly provedeny<\/a><\/noindex> zm\u011bny<\/a><\/noindex>, varuj\u00edc\u00ed p\u0159ed brzk\u00fdm ukon\u010den\u00edm podpory 32bitov\u00fdch hostitelsk\u00fdch syst\u00e9m\u016f b\u011b\u017e\u00edc\u00edch v re\u017eimu paravirtualizace pod veden\u00edm hypervizoru Xen. U\u017eivatel\u016fm t\u011bchto syst\u00e9m\u016f se doporu\u010duje p\u0159ej\u00edt na pou\u017e\u00edv\u00e1n\u00ed 64bitov\u00fdch jader v hostitelsk\u00fdch prost\u0159ed\u00edch nebo pro spu\u0161t\u011bn\u00ed prost\u0159ed\u00ed m\u00edsto paravirtualizace (PV) vyu\u017e\u00edvat re\u017eimy pln\u00e9 (HVM) nebo kombinovan\u00e9 (PVH) virtualizace. <\/p>\n

Re\u017eim PV mo\u017enost<\/a><\/noindex> byl ozna\u010den za zastaral\u00fd a nahradil ho PVH, ve kter\u00e9m jsou prvky paravirtualizace (PV) omezeny na input\/output, zpracov\u00e1n\u00ed p\u0159eru\u0161en\u00ed, organizaci zav\u00e1d\u011bn\u00ed a interakci s hardwarem, zat\u00edmco pro omezen\u00ed privilegovan\u00fdch instrukc\u00ed, izolaci syst\u00e9mov\u00fdch vol\u00e1n\u00ed a virtualizaci tabulek str\u00e1nek pam\u011bti se pou\u017e\u00edv\u00e1 pln\u00e1 virtualizace (HVM). Jako argument proti podpo\u0159e re\u017eimu PV pro 32bitov\u00e9 hostitelsk\u00e9 syst\u00e9my se tak\u00e9 uv\u00e1d\u00ed nedostatek ochrany p\u0159ed zranitelnost\u00ed. Meltdown<\/a><\/noindex>.<\/p>\n

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

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

\u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 \u044f\u0434\u0440\u0430 Linux, \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0444\u043e\u0440\u043c\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0432\u044b\u043f\u0443\u0441\u043a 5.4, \u0432\u043d\u0435\u0441\u0435\u043d\u044b \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0434\u0430\u044e\u0449\u0438\u0435 \u043e \u0441\u043a\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 32-\u0440\u0430\u0437\u0440\u044f\u0434\u043d\u044b\u0445 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u043f\u0430\u0440\u0430\u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u043e\u0434 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 Xen. \u041f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 64-\u0440\u0430\u0437\u0440\u044f\u0434\u043d\u044b\u0445 \u044f\u0434\u0435\u0440 \u0432 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u0445 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u0438\u043b\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0439 \u0432\u043c\u0435\u0441\u0442\u043e \u043f\u0430\u0440\u0430\u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 (PV) \u0440\u0435\u0436\u0438\u043c\u044b \u043f\u043e\u043b\u043d\u043e\u0439 (HVM) \u0438\u043b\u0438 \u043a\u043e\u043c\u0431\u0438\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 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