Il 17/03/2014 18:47, Waiman Long ha scritto:
Yeah, what I mean is that the patches that enable paravirtualization
should also take care of decreasing the unfair-lock jump label when
paravirtualization is enabled.
As there are people who don't like unfair lock at all, I prefer to give
them the option to turn this on or off instead of forcing them to always
use unfair lock in a PV guest.
I understand, but this is virtualization after all. A bad scheduler
decision means no progress at all. That's much worse than unfairness.
And also, KVM and Xen will stay fair, so if you want fairness just pick
a hypervisor that supports it.
Paolo
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