Re: Userspace tools (was Re: [PATCH][RESEND] maps: PSS(proportional set size) accounting in smaps)

[Andrew Morton <akpm@linux-foundation.org>]

On Mon, 17 Sep 2007 10:00:57 +0100 Christoph Hellwig <hch@infradead.org> wrote:

> On Mon, Sep 17, 2007 at 12:38:50PM +0530, Balbir Singh wrote:
> > Andrew Morton wrote:
> > > On Mon, 17 Sep 2007 10:40:54 +0800 Fengguang Wu <wfg@mail.ustc.edu.cn> wrote:
> > > 
> > >> Matt Mackall's pagemap/kpagemap and John Berthels's exmap can also do the job.
> > >> They are comprehensive tools. But for PSS, let's do it in the simple way. 
> > > 
> > > right.  I'm rather reluctant to merge anything which could have been done from
> > > userspace via the maps2 interfaces.
> > > 
> > > See, this is why I think the kernel needs a ./userspace-tools/ directory.  If
> > > we had that, you might have implemented this as a little proglet which parses
> > > the maps2 files.  But we don't have that, so you ended up doing it in-kernel.
> > 
> > Andrew, I second the userspace-tools idea. I would also add an FAQ in
> > that directory, explaining what problem each tool solves. I think your
> > page cache control program would be a great example of something to put
> > in there.
> 
> It's called the util-linux package.

That's the theory.  I'd be interested in seeing someone test it out: submit
something and see if/when it goes in and gets redistributed.

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