Re: [PATCH] Skip tsc synchronization checks if CONSTANT_TSC bit is set.

From: Andi Kleen
Date: Wed Oct 22 2008 - 18:06:00 EST

> > Adding it with vmware detection code is not useful.
> The VMware detection code is something that's needed anyways for other
> purposes(getting tsc_freq right now). So the code which force sets this
> TSC_CONSTANT bit is trivial.

It would be better to eliminate that too. Why do you need it anyways?

> Apart from that, as i said yesterday, this should be viewed as a special
> case for VMware products which don't already set this bit. Changing the
> behavior for already existing products is not feasible.

On old hypervisors Linux already runs fine without TSC, doesn't it?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at