Re: [CFT][RFC] HT scheduler

Andi Kleen
2003-12-14T16:26:25Z

Arjan van de Ven <arjanv@redhat.com> writes:
>
> also keep in mind that current x86 processors all will internally
> optimize out the lock prefix in UP mode or when the cacheline is owned
> exclusive.... If HT matters here let the cpu optimize it out.....

Are you sure they optimize it out in UP mode? IMHO this would break
device drivers that use locked cycles to communicate with bus master
devices (and which are not necessarily mapped uncachable/write combining)

-Andi