Re: [PACTH v1] trace: Add trace events for open(), exec() and uselib()

[Ingo Molnar]

* Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:

> On Mon, Aug 01, 2016 at 01:25:40PM -0400, robert.foss@xxxxxxxxxxxxx wrote:
> > From: Scott James Remnant <scott@xxxxxxxxxx>
> > 
> > This patch uses TRACE_EVENT to add tracepoints for the open(),
> > exec() and uselib() syscalls so that ureadahead can cheaply trace
> > the boot sequence to determine what to read to speed up the next.
> 
> NAK.  No Tracepoints In VFS.  Not going to happen - any tracepoint can all too
> easily become a cast-in-stone userland ABI.

And what's the problem with that? ABIs increase the utility of the kernel.

Thanks,

	Ingo