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    SubjectRe: [PATCH] x86: Export tsc related information in sysfs
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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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