Re: [PATCH 2/2] tracing: syscall_regfunc() should not skip kernelthreads

From: Steven Rostedt
Date: Sun Mar 17 2013 - 15:36:20 EST

On Sun, 2013-03-17 at 20:04 +0100, Oleg Nesterov wrote:

> > I'm really thinking the TIF_SYSCALL_TRACEPOINT flag is getting a bit
> > ridiculous. We really should have a "swap syscall table when tracepoints
> > enabled" that changes the syscall table that does exactly the same thing
> > as the normal table but wraps the system call with the tracepoints.
> But we also need to force the slow path in system_call...

Why? If we remove the tracepoint from the slowpath and use a table swap,
then we wouldn't need to use the slowpath at all.

> Anyway, do you agree with this change for now?

Well, if it's solving a bug today sure. But we should really be looking
at fixing what's there for the future.

-- Steve

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