{"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\/hu\/blog\/news\/razrabotchiki-yadra-linux-na-puti-k-udaleniyu-podderzhki-proczessorov-i486","title":{"rendered":"A Linux kernel fejleszt\u0151i \u00faton vannak az i486 processzorok t\u00e1mogat\u00e1s\u00e1nak elt\u00e1vol\u00edt\u00e1s\u00e1hoz.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ingo Molnar, az x86 architekt\u00fara, a blokkol\u00e1si mechanizmus \u00e9s a Linux kernel feladat\u00fctemez\u0151j\u00e9nek karbantart\u00f3ja, egy patch-gy\u0171jtem\u00e9nyt javasolt, amely elt\u00e1vol\u00edtja a kernelb\u0151l a 486-os processzorok (M486, M486SX, AMD ELAN) \u00e9s a korai 586-os processzorok t\u00e1mogat\u00e1s\u00e1t. A kernelben csak azok a x86 processzorok maradnak, amelyek t\u00e1mogatj\u00e1k a CX8 (CMPXCHG8B) utas\u00edt\u00e1st \u00e9s a TSC (Time Stamp Counter) regisztert, amelyek a Pentium CPU-ban jelentek meg. <\/p>\n

Megjegyzik, hogy a 486-os CPU t\u00e1mogat\u00e1sa \u00e9rdek\u00e9ben a kernelnek olyan k\u00f3dot kell tartania, amely emul\u00e1lja a CX8 (8 b\u00e1jt \u00f6sszehasonl\u00edt\u00e1s \u00e9s csere) \u00e9s a TSC (CPU ciklussz\u00e1ml\u00e1l\u00f3, amelyet a feladat\u00fctemez\u0151 haszn\u00e1l) m\u0171veleteit. Az ilyen k\u00f3d bonyol\u00edtja a kernelt, nehez\u00edti a karbantart\u00e1st, \u00e9s id\u0151nk\u00e9nt probl\u00e9m\u00e1k forr\u00e1s\u00e1v\u00e1 v\u00e1lik, amelyek megold\u00e1sa id\u0151t vesz ig\u00e9nybe a fejleszt\u0151k sz\u00e1m\u00e1ra. A 486-os t\u00e1mogat\u00e1s megsz\u00fcntet\u00e9se lehet\u0151v\u00e9 tenn\u00e9, hogy 14104 sor k\u00f3dot t\u00e1vol\u00edtsanak el a kernb\u0151l, ami jelent\u0151sen egyszer\u0171s\u00edten\u00e9 az egyes funkci\u00f3kat az\u00e1ltal, hogy megsz\u00fcnteti a CX8 \u00e9s a TSC emul\u00e1l\u00e1s\u00e1\u00e9rt felel\u0151s r\u00e9tegeket, \u00e9s megszabad\u00edt a math-emu k\u00f6nyvt\u00e1rt\u00f3l is, amely az FPU emul\u00e1l\u00e1s\u00e1\u00e9rt felel\u0151s. <\/p>\n

A patch-ek k\u00f6zz\u00e9t\u00e9tel\u00e9t megel\u0151z\u0151 napon Linus Torvalds felvetette a 486-os t\u00e1mogat\u00e1s elt\u00e1vol\u00edt\u00e1s\u00e1nak sz\u00fcks\u00e9gess\u00e9g\u00e9t a CX8 emul\u00e1l\u00e1sa k\u00f6r\u00fcli vita sor\u00e1n. Linus \u00fagy v\u00e9li, hogy el\u00e9rkezett az id\u0151 a 486-os CPU t\u00e1mogat\u00e1s\u00e1nak elhagy\u00e1s\u00e1ra, \u00e9s nem l\u00e1t okot arra, hogy a fejleszt\u0151k idej\u00e9t az ebb\u0151l fakad\u00f3 probl\u00e9m\u00e1k megold\u00e1s\u00e1ra pazarolj\u00e1k. A 386-os processzorok t\u00e1mogat\u00e1s\u00e1t 2012-ben t\u00e1vol\u00edtott\u00e1k el a kernb\u0151l. A vit\u00e1ban r\u00e9szt vev\u0151 egyesek szerint most j\u00f6tt el az id\u0151 a 486-os CPU t\u00e1mogat\u00e1s\u00e1nak elt\u00e1vol\u00edt\u00e1s\u00e1ra. 2022 okt\u00f3ber\u00e9ben Linus m\u00e1r el\u0151terjesztette ezt a javaslatot, de az nem kapott tov\u00e1bbi fejlem\u00e9nyeket. <\/p>\n

A m\u00e9g haszn\u00e1lt 486-os rendszerekhez kapcsol\u00f3d\u00f3 kernelverzi\u00f3k a Linux eset\u00e9ben gyakorlatilag m\u00e1r nincsenek haszn\u00e1latban. A be\u00e1gyazott rendszerekhez kifejlesztett 486-os processzor-speci\u00e1lis v\u00e1ltozatai, mint p\u00e9ld\u00e1ul az Intel Quark, t\u00e1mogatj\u00e1k a CX8 \u00e9s TSC-t, \u00edgy azok m\u00f3dos\u00edt\u00e1sa nem \u00e9rinti \u0151ket. Az \u00f6reg, eredeti 486-os CPU-k \u00e1ltal\u00e1ban elavult disztrib\u00faci\u00f3kkal haszn\u00e1latosak, amelyek r\u00e9gi Linux kernel verzi\u00f3kat sz\u00e1ll\u00edtanak. A modern Linux disztrib\u00faci\u00f3k r\u00e9g\u00f3ta megsz\u00fcntett\u00e9k a 32 bites x86 rendszerek t\u00e1mogat\u00e1s\u00e1t vagy \u00e1t\u00e1lltak az X86_PAE opci\u00f3ra, amely CX8 t\u00e1mogat\u00e1st ig\u00e9nyel.
\n
Forr\u00e1s: 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\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\udd47A Linux kernel fejleszt\u0151i az i486 processzorok t\u00e1mogat\u00e1s\u00e1nak elt\u00e1vol\u00edt\u00e1sa fel\u00e9 haladnak | ProHoster","description":"Ingo Molnar, az x86 architekt\u00fara, a blokkol\u00e1si mechanizmus \u00e9s a feladat\u00fctemez\u0151 karbantart\u00f3ja a Linux kernelben, vit\u00e1ra bocs\u00e1tott egy patch sorozatot, amely elt\u00e1vol\u00edtja a kernelb\u0151l az M486 (M486, M486SX, AMD ELAN) 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