linux-kernel - Re: [Patch] mm tracepoints

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Message-Id: <1236363625.6326.641.camel@laptop>
Date:	Fri, 06 Mar 2009 19:20:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Larry Woodman <lwoodman@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, fweisbec@...il.com
Subject: Re: [Patch] mm tracepoints

On Fri, 2009-03-06 at 19:01 +0100, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > On Fri, 2009-03-06 at 18:38 +0100, Peter Zijlstra wrote:
> > > On Fri, 2009-03-06 at 18:10 +0100, Ingo Molnar wrote:
> > > > Looks pretty good and useful to me. I've Cc:-ed more mm folks, 
> > > > it would be nice to hear their opinion about these tracepoints.
> > > > 
> > > > Andrew, Nick, Peter, what do you think?
> > > 
> > > Bit sad we use the struct mm_struct * as mm identifier (little %lx vs %p
> > > confusion there too), but I suppose there simply isn't anything better.
> > 
> > > Things missing, 
> > 
> > Why only anon and filemap, that misses out on all the funky 
> > driver ->fault() handlers.
> 
> btw., does it include shm faults? I think all of this would be 
> handled if the tracepoint was at handle_mm_fault(), right?

Partially, you wouldn't be able to do the file:offset thing you asked
for.

But yeah, also hugetlb seems to be missing.

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