Re: [PATCH] tracer for sys_open() - sreadahead

[Harald Hoyer]

Ingo Molnar wrote:
> * Pavel Machek <pavel@xxxxxxx> wrote:
>
> > On Tue 2009-01-27 12:08:04, Kok, Auke wrote:
> > > This tracer monitors regular file open() syscalls. This is a fast
> > > and low-overhead alternative to strace, and does not allow or
> > > require to be attached to every process.
> > >
> > > The tracer only logs succesfull calls, as those are the only ones we
> > > are currently interested in, and we can determine the absolute path
> > > of these files as we log.
> > Maybe fanotify() should be used instead?
> >
> > Or maybe just plain strace? One slow boot should not really hurt...
>
> ptrace is out of question for good tracing because it's not a transparent 
> probe. (ptrace monopolizes the traced task - if we use that then we break 
> regular strace usage.)
>
> 	Ingo

Can strace can be used on init?

$ man strace
...
       On Linux, exciting as it would be, tracing the init process is forbidden.
...

Any hope getting _any_ mechanism in the kernel??

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