Re: [PATCH] uprobes: Add exports for module use

[Oleg Nesterov <oleg@redhat.com>]

On 01/11, Christoph Hellwig wrote:
>
> On Thu, Jan 10, 2013 at 03:01:46PM -0800, Josh Stone wrote:
> > The original pull message for uprobes (commit 654443e2) noted:
> >
> >   This tree includes uprobes support in 'perf probe' - but SystemTap
> >   (and other tools) can take advantage of user probe points as well.
> >
> > In order to actually be usable in module-based tools like SystemTap, the
> > interface needs to be exported.  This patch first adds the obvious
> > exports for uprobe_register and uprobe_unregister.  Then it also adds
> > one for task_user_regset_view, which is necessary to get the correct
> > state of userspace registers.
>
> Get systemtap into the mainline kernel tree and we can talk.

I can't understand your reply.

Looks like, you do not like the fact that uprobes can be used by the out
of tree modules. Why?

And why, say, kprobe_register() is exported then? Afaics, it does not
have any modular in-kernel user.

As for systemtap in particular. I never used it, and probably you didn't.
But it has a lot of users, and I know many people who find it very useful.

Oleg.