Messages in this thread | | | Subject | Re: [PATCH] x86: Export tsc related information in sysfs | From | Peter Zijlstra <> | Date | Tue, 18 May 2010 13:58:54 +0200 |
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On Tue, 2010-05-18 at 13:25 +0200, Andi Kleen wrote: > On Tue, May 18, 2010 at 11:58:18AM +0200, Peter Zijlstra wrote: > > On Sun, 2010-05-16 at 22:06 -0700, Arjan van de Ven wrote: > > > look we're not disabling ring 3 tsc. We could, but we don't. > > > > Maybe we should. > > That would kill the vsyscall too. Remember it's running in ring 3. > > That is in theory you could disable it on systems where the vsyscall > doesn't use it, but then you would likely break huge amounts of software, > unless you emulate it.
Well, software shouldn't use it, so breaking it sounds like a fine idea ;-)
Also, a slow emulation is an incentive to actually do the right thing.
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