linux-kernel - Re: [PATCHv6 0/7] ftrace, perf: Adding support to use function trace

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Date:	Wed, 18 Jan 2012 16:43:26 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Jiri Olsa <jolsa@...hat.com>, mingo@...hat.com, paulus@...ba.org,
	acme@...stprotocols.net, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, aarapov@...hat.com
Subject: Re: [PATCHv6 0/7] ftrace, perf: Adding support to use function trace

Frederic,

Can you review and ACK this patch set (if you don't find anything wrong
with it). I can then run it through a bunch of tests.

Thanks,

-- Steve



On Wed, 2012-01-18 at 19:44 +0100, Jiri Olsa wrote:
> hi,
> here's another version of perf support for function trace
> with filter. 
> 
> attached patches:
>   1/7 ftrace: Change filter/notrace set functions to return exit code
>   2/7 ftrace: Add enable/disable ftrace_ops control interface
>   3/7 ftrace, perf: Add open/close tracepoint perf registration actions
>   4/7 ftrace, perf: Add add/del tracepoint perf registration actions
>   5/7 ftrace, perf: Add support to use function tracepoint in perf
>   6/7 ftrace, perf: Distinguish ftrace function event field type
>   7/7 ftrace, perf: Add filter support for function trace event
> 
> v6 changes:
>   2/7 - added comments to FTRACE_OPS_FL_* bits enum
>   5/7 - added more info to the change log regarding ftrace_ops enable/disable
>   7/7 - rebased to the latest filter changes
> 
> v5 changes:
>   7/7 - fixed to properly support ',' in filter expressions
> 
> v4 changes:
>   2/7 - FL_GLOBAL_CONTROL changed to FL_GLOBAL_CONTROL_MASK
>       - changed WARN_ON_ONCE() to include the !preempt_count()
>       - changed this_cpu_ptr to per_cpu_ptr
> 
>   ommited Fix possible NULL dereferencing in __ftrace_hash_rec_update
>   (2/8 in v3)
> 
> v3 changes:
>   3/8 - renamed __add/remove_ftrace_ops
>       - fixed preemtp_enable/recursion_clear order in ftrace_ops_control_func 
>       - renamed/commented API functions -  enable/disable_ftrace_function
>   
>   ommited graph tracer workarounf patch 10/10  
> 
> v2 changes:
>  01/10 - keeping the old fix instead of adding hash_has_contents func
>          I'll send separating patchset for this
>  02/10 - using different way to avoid the issue (3/9 in v1)
>  03/10 - using the way proposed by Steven for controling ftrace_ops
>          (4/9 in v1)
>  06/10 - added check ensuring the ftrace:function event could be used by
>          root only (7/9 in v1)
>  08/10 - added more description (8/9 in v1)
>  09/10 - changed '&&' operator to '||' which seems more suitable
>          in this case (9/9 in v1)
> 
> thanks,
> jirka
> ---
>  include/linux/ftrace.h             |   61 ++++++++++-
>  include/linux/ftrace_event.h       |    9 +-
>  include/linux/perf_event.h         |    3 +
>  kernel/trace/ftrace.c              |  140 +++++++++++++++++++++--
>  kernel/trace/trace.h               |   11 ++-
>  kernel/trace/trace_event_perf.c    |  214 +++++++++++++++++++++++++++++-------
>  kernel/trace/trace_events.c        |   12 ++-
>  kernel/trace/trace_events_filter.c |  172 +++++++++++++++++++++++++++--
>  kernel/trace/trace_export.c        |   53 ++++++++-
>  kernel/trace/trace_kprobe.c        |    8 +-
>  kernel/trace/trace_syscalls.c      |   18 +++-
>  11 files changed, 617 insertions(+), 84 deletions(-)


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