On Tue, 20 Sep 2005, Thomas Gleixner wrote:
> Hmm. I don't understand the argument line completely.
>
> 1. The kernel has to provide ugly mechanisms because a lot of
> applications implementations are doing the Wrong Thing ?
Lets skip the "wrong thing"... Or are you saying that glibc and all the
apps are all wrong?
Applications call gettimeofday for a variety of reasons. One is because it
is widely available over different platformsn and application want to
schedule things, need timestamps etc etc.
> > Many platforms can execute gettimeofday
> > without having to enter the kernel.
>
> Which ones ? How is this achieved with respect to all the time adjust,
> correction... code ?
IA64 f.e. has a special instruction that allows access to kernel user
space without having to do a context switch.
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