Letoto la li-processor tsa AMD EPYC 2018 ("Rome") tse thehiloeng ho "Zen 7002" microarchitecture e rometsoeng ho tloha ka 2 e na le kokoana e etsang hore processor e fanyehe ka mor'a matsatsi a 1044 a ts'ebetso ntle le ho seta bocha (system reboot). E le mekhoa ea ho thibela bothata, ho kgothaletswa ho tima ts'ehetso ea mokhoa oa ho boloka matla oa CC6 kapa ho qala seva hape ho feta hanngoe ka matsatsi a 1044 (hoo e ka bang lilemo tse 2 likhoeli tse 10).
Ho latela tlhaiso-leseling e phatlalalitsoeng ke AMD, ho fanyeha ho bakoa ke ho oa ho etsahalang ha processor ea mantlha e leka ho tsoha ho tsoa ho mokhoa oa ho boloka matla oa CC6 (core-C6, e theola voltage ha e sa sebetse) ha timer e fihla boleng ba matsatsi a 1044. ka mor'a ho qetela ho tsosolosa boemo ba CPU (nako ea ponahatso e ka 'na ea fapana ho itšetlehile ka maqhubu a REFCLK).
AMD ha e fane ka tlhaloso e qaqileng haholoanyane ea sesosa sa ho hloleha. Ho latela maikutlo a phatlalalitsoeng ho Reddit, hang ha k'haontareng e ngolisoang ea TSC (Time Stamp Counter), e balang palo ea lipotoloho tsa ts'ebetso kamora ho hlophisoa bocha, ka makhetlo a 2800 MHz e fihla boleng ba 0x380000000000000 (2800 MHz * 10 * * 6 * 1042.5, ke hore ka mor'a matsatsi a 1042 le lihora tse 12).
Tokiso ea bug ha e na ho phatlalatsoa. Bothata bo ile ba lula bo sa hlokomeloe ka nako e telele, kaha nako ea lilemo tse ngata ha e tloaelehe bakeng sa li-server tseo, e le hore li lule li le teng, nako le nako li tlameha ho tsosolosoa ho kenya lisebelisoa tsa kernel kapa ho fetolela tokollong e ncha ea tsamaiso ea tsamaiso. Leha ho le joalo, mekhoa ea ntlafatso ea "non-reboot kernel" ea Linux Distribution le lipotoloho tse telele tsa tlhokomelo (Ubuntu, RHEL, le SUSE li tšehelitsoe ke lilemo tse 10) li ka lebisa nako e telele ea ho leta li-server ntle le ho qala bocha.
Source: opennet.ru