Re: [RFC PATCH] LTTng instrumentation mm (updated)

Dave Hansen
2007-12-04T20:24:59Z

On Tue, 2007-12-04 at 15:05 -0500, Mathieu Desnoyers wrote:
> * Dave Hansen (haveblue@us.ibm.com) wrote:
> > On Tue, 2007-12-04 at 14:25 -0500, Mathieu Desnoyers wrote:
> > >
> > > - I also dump the equivalent of /proc/swaps (with kernel internal
> > > information) at trace start to know what swap files are currently
> > > used.
> >
> > What about just enhancing /proc/swaps so that this information can be
> > useful to people other than those doing traces?
>
> It includes an in-kernel struct file pointer, exporting it to userspace
> would be somewhat ugly.

What about just exporting the 'type' field that we use to index into
swap_info[]?

As far as /proc goes, it may not be _ideal_ for your traces, but it sure
beats not getting the information out at all. ;) I guess I'm just not
that familiar with the tracing requirements and I can't really assess
whether what you're asking for is reasonable, or horrible
over-engineering. Dunno.

-- Dave