{"id":124015,"date":"2025-05-04T09:05:07","date_gmt":"2025-05-04T07:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/razrabotchiki-yadra-linux-na-puti-k-udaleniyu-podderzhki-proczessorov-i486"},"modified":"2025-05-04T09:05:07","modified_gmt":"2025-05-04T07:05:07","slug":"razrabotchiki-yadra-linux-na-puti-k-udaleniyu-podderzhki-proczessorov-i486","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/razrabotchiki-yadra-linux-na-puti-k-udaleniyu-podderzhki-proczessorov-i486","title":{"rendered":"Deweloperzy j\u0105dra Linux d\u0105\u017c\u0105 do usuni\u0119cia wsparcia dla procesor\u00f3w i486","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ingo Molnar, maintainer architektury x86, mechanizmu blokad i harmonogramu zada\u0144 w j\u0105drze Linux, przedstawi\u0142 do dyskusji zestaw poprawek, kt\u00f3re usuwaj\u0105 z j\u0105dra wsparcie dla procesor\u00f3w 486 (M486, M486SX, AMD ELAN) oraz wczesnych serii procesor\u00f3w 586. W j\u0105drze proponuje si\u0119 pozostawienie jedynie mo\u017cliwo\u015bci pracy z procesorami x86, kt\u00f3re obs\u0142uguj\u0105 instrukcj\u0119 CX8 (CMPXCHG8B) oraz rejestr TSC (Counter Czasu), kt\u00f3re pojawi\u0142y si\u0119 w procesorach Pentium. <\/p>\n

Zauwa\u017ca si\u0119, \u017ce aby obs\u0142ugiwa\u0107 procesory 486, w j\u0105drze musi by\u0107 utrzymywany kod emuluj\u0105cy operacje CX8 (por\u00f3wnanie i wymiana 8 bajt\u00f3w) oraz TSC (licznik cykli CPU u\u017cywany przez harmonogram zada\u0144). Taki kod komplikuje j\u0105dro, utrudnia utrzymanie i czasami staje si\u0119 \u017ar\u00f3d\u0142em problem\u00f3w, kt\u00f3rych rozwi\u0105zanie zajmuje czas deweloper\u00f3w. Zaprzestanie wsparcia dla 486 pozwoli na usuni\u0119cie z j\u0105dra 14104 linii kodu, co znacznie upro\u015bci niekt\u00f3re funkcje w j\u0105drze dzi\u0119ki wyeliminowaniu warstw emuluj\u0105cych CX8 i TSC oraz umo\u017cliwi pozbycie si\u0119 biblioteki math-emu, emuluj\u0105cej FPU. <\/p>\n

Dzie\u0144 przed publikacj\u0105 poprawek, Linus Torvalds poruszy\u0142 kwesti\u0119 zasadno\u015bci usuni\u0119cia wsparcia dla 486 podczas dyskusji na temat problemu, kt\u00f3ry manifestowa\u0142 si\u0119 przy emulacji CX8. Linus uwa\u017ca, \u017ce nadszed\u0142 czas, aby zrezygnowa\u0107 z obs\u0142ugi procesor\u00f3w 486 i nie widzi powod\u00f3w, by dalej po\u015bwi\u0119ca\u0107 czas deweloper\u00f3w na rozwi\u0105zywanie problem\u00f3w, kt\u00f3re si\u0119 z nimi wi\u0105\u017c\u0105. Wsparcie procesor\u00f3w 386 zosta\u0142o usuni\u0119te z j\u0105dra w 2012 roku. Wed\u0142ug uczestnik\u00f3w dyskusji, obecnie nasta\u0142 czas, aby usun\u0105\u0107 wsparcie dla CPU 486. W pa\u017adzierniku 2022 roku Linus ju\u017c publikowa\u0142 podobn\u0105 propozycj\u0119, ale nie spotka\u0142a si\u0119 ona z rozwini\u0119ciem. <\/p>\n

W systemach 486, kt\u00f3re wci\u0105\u017c s\u0105 w u\u017cyciu, aktualne j\u0105dra Linux praktycznie nie s\u0105 wykorzystywane. Specjalizowane wersje procesor\u00f3w 486 do system\u00f3w wbudowanych, takie jak Intel Quark, obs\u0142uguj\u0105 CX8 i TSC, wi\u0119c ich zmiana ich nie dotknie. Stare, oryginalne CPU 486 zazwyczaj wci\u0105\u017c s\u0105 u\u017cywane z przestarza\u0142ymi dystrybucjami, kt\u00f3re dostarczaj\u0105 stare wersje j\u0105dra Linux. Nowoczesne dystrybucje Linux od dawna zaprzesta\u0142y wsparcia dla 32-bitowych system\u00f3w x86 lub przesz\u0142y na u\u017cycie opcji X86_PAE podczas kompilacji, co wymaga wsparcia dla CX8.
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\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u043d\u0433\u043e \u041c\u043e\u043b\u043d\u0430\u0440 (Ingo Molnar), \u043c\u044d\u0439\u043d\u0442\u0435\u0439\u043d\u0435\u0440 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b x86, \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043e\u043a \u0438 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0437\u0430\u0434\u0430\u0447 \u0432 \u044f\u0434\u0440\u0435 Linux, \u0432\u044b\u0441\u0442\u0430\u0432\u0438\u043b \u043d\u0430 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439, \u0443\u0434\u0430\u043b\u044f\u044e\u0449\u0438\u0445 \u0438\u0437 \u044f\u0434\u0440\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 486 (M486, M486SX, AMD ELAN) \u0438 \u043d\u0430\u0447\u0430\u043b\u044c\u043d\u044b\u0445 \u0441\u0435\u0440\u0438\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 586. \u0412 \u044f\u0434\u0440\u0435 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u043c\u0438 x86, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u043c\u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044e CX8 (CMPXCHG8B) \u0438 \u0440\u0435\u0433\u0438\u0441\u0442\u0440 TSC (Time Stamp Counter), […]<\/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-124015","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Deweloperzy j\u0105dra Linux d\u0105\u017c\u0105 do usuni\u0119cia wsparcia dla procesor\u00f3w i486 | ProHoster","description":"Ingo Molnar, g\u0142\u00f3wny deweloper architektury x86, mechanizmu blokad i planera zada\u0144 w j\u0105drze Linux, przedstawi\u0142 do dyskusji zestaw poprawek, kt\u00f3re usuwaj\u0105 wsparcie dla procesor\u00f3w 486 (M486, M486SX, AMD ELAN).","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/razrabotchiki-yadra-linux-na-puti-k-udaleniyu-podderzhki-proczessorov-i486","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u044f\u0434\u0440\u0430 Linux \u043d\u0430 \u043f\u0443\u0442\u0438 \u043a \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 i486 | 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