Katswiri wochokera ku VMware adadziwitsa gulu lachitukuko cha Linux kernel kuchepa kwakukulu kwa magwiridwe antchito mukamagwiritsa ntchito Linux kernel 5.19. Kuyesedwa kwa makina pafupifupi ndi kernel 5.19 atazunguliridwa ndi VMware ESXi hypervisor anasonyeza kuchepa kompyuta ntchito ndi 70%, ntchito maukonde ndi 30%, ndi ntchito yosungirako ndi 13%, poyerekeza ndi kasinthidwe chimodzimodzi zochokera kernel 5.18.
Chifukwa cha kuchepa kwa magwiridwe antchito ndikusintha kwa code yodzitchinjiriza motsutsana ndi kuukira kwa gulu la Specter v2 (spectre_v2=ibrs), yokhazikitsidwa pamaziko a malangizo a IBRS (Enhanced Indirect Branch Restricted Speculation), omwe amalola kulola ndikuletsa zongopeka. kutsata malangizo panthawi yosokoneza ndikuyimbira mafoni ndi masinthidwe azinthu. Chitetezo chimaphatikizidwa kuti mutseke chiwopsezo cha Retbleed chomwe chapezeka posachedwa pamakina opangira kusintha kosalunjika kwa CPU, komwe kumakupatsani mwayi wochotsa zidziwitso kuchokera ku kukumbukira kwa kernel kapena kukonza zowukira pamakina omwe akukhala nawo. Mukathimitsa chitetezo (spectre_v2=off), magwiridwe antchito amabwerera kumlingo wake wakale.
Source: opennet.ru