Re: [RFC PATCH 1/2] Marker probes in futex.c

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From: Mathieu Desnoyers <mathieu.desnoyers@...>

To: Frank Ch. Eigler <fche@...>

Cc: Peter Zijlstra <a.p.zijlstra@...>, <prasad@...>, <linux-kernel@...>, <tglx@...>, <mingo@...>, Christoph Hellwig <hch@...>

Subject: Re: [RFC PATCH 1/2] Marker probes in futex.c

Date: Thursday, April 17, 2008 - 4:16 pm

* Frank Ch. Eigler (fche@redhat.com) wrote:
[..]
quoted text> > >+       trace_mark(futex_wake_called, "uaddr:%p fshared:%p nr_wake:%d "
> > > +                       "bitset:%d",
> > > +                       uaddr, fshared, nr_wake, bitset);
> > 
> > > +       INIT_FUTEX_DEBUG_PROBE(futex_wake_called,
> > > +                       "uaddr:%p fshared:%p nr_wake:%d bitset:%d"),
> > 
> > Why the need to duplicate it; that's utter madness.
> 
> This second instance is optional and is used as a consistency check
> for the event consumer to hook up exactly to the intended producer.
> The string could be empty.
> 

empty -> NULL , yes :)

quoted text> 
> - FChE

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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Messages in current thread:

[RFC PATCH 0/2] Debugging infrastructure for Futexes using M..., K. Prasad, (Tue Apr 15, 7:50 am)

[RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 7:53 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Tue Apr 15, 8:02 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Andrew Morton, (Fri Apr 18, 6:44 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 11:52 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Wed Apr 16, 11:51 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Thu Apr 17, 6:02 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Fri Apr 18, 2:46 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Sat Apr 19, 10:13 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 10:56 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Fri Apr 18, 10:29 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 10:52 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Sat Apr 19, 2:03 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Sat Apr 19, 2:29 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Sat Apr 19, 2:48 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Nicholas Miell, (Tue Apr 22, 1:50 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Sat Apr 19, 8:28 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 8:32 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Tue Apr 15, 8:56 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 9:25 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Wed Apr 16, 11:51 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Thu Apr 17, 3:19 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Peter Zijlstra, (Fri Apr 18, 2:56 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Thu Apr 17, 4:16 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Sat Apr 19, 8:13 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Sat Apr 19, 5:33 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 9:17 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 9:47 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 12:48 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 5:38 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Wed Apr 16, 9:17 am)

text_poke, vmap and vmalloc on x86_64, Mathieu Desnoyers, (Wed Apr 16, 4:10 pm)

Re: text_poke, vmap and vmalloc on x86_64, Mathieu Desnoyers, (Wed Apr 16, 5:22 pm)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 9:46 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 10:00 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 10:24 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 10:48 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Arjan van de Ven, (Wed Apr 16, 11:32 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Wed Apr 16, 11:39 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Wed Apr 16, 10:29 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Ingo Molnar, (Tue Apr 15, 10:04 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Mathieu Desnoyers, (Tue Apr 15, 10:39 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Frank Ch. Eigler, (Tue Apr 15, 10:21 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, Alexey Dobriyan, (Tue Apr 15, 8:50 am)

Re: [RFC PATCH 1/2] Marker probes in futex.c, K. Prasad, (Tue Apr 15, 12:13 pm)

[RFC PATCH 2/2] Marker handler for the probes in futex file, K. Prasad, (Tue Apr 15, 7:55 am)

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