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Für Privatanwender ist es auch mehr oder weniger irrelevant....aber lies dir mal Kommentare von Admins durch, die sehen das ganz anders!
Hier ein kleiner Auszug eines Kernel-Programmieres: lists.dragonflybsd.org/pipermail/users/2018-January/313758.html
....
Unfortunately, the only mitigation possible is to remove the
kernel memory mappings from the user MMU map, which means that every single system call and interrupt (and the related return to userland later) must
reload the MMU twice. This will add 150ns - 250ns of overhead to every
system call and interrupt. System calls usually have an overhead of only
100ns, so now it will be 250nS - 350nS of overhead on Intel CPUs.
.....
-- PERFORMANCE EFFECTS ON SYSTEMS --
Nominal program execution will lose around 5% of its performance with this
mitigation. e.g. compiles, utilities, etc. Not too bad.
Any system-call-heavy or interrupt-heavy program will lose between 10% and 30% of its performance. This can include databases, high-speed storage
operations, very high-speed network operations (e.g. 10GBe or faster), and
virtualized operations.
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Wertung | Antworten | Thema | Verfasser | letzter Verfasser | letzter Beitrag | |
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