[Xen-devel] Re: rdtsc: correctness vs performance on Xen (and KVM?)

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 01/09/2009 14:54, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> 
>> Making vsyscall work...
> 
> While I highly respect your opinion, and while vsyscall
> may be a fine choice in the future, it just doesn't
> solve the problem today and won't solve it ever for
> currently shipping PV OS's.  If you can figure out a
> way to allow vsyscall to be installed as a module and
> still achieve its performance, it
> might be a possible solution, but otherwise we have
> to go around the OS to solve this problem.

Do you believe there's a solution which doesn't involve PV kernel
modifications? I think the suggestions you've made so far would require such
modifications.

 -- Keir



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