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  1. 01 Aug, 2010 1 commit
    • Frederic Weisbecker's avatar
      perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call · 669336e4
      Frederic Weisbecker authored 
      We use synchronize_sched() to ensure a tracepoint won't be called
while/after we release the perf buffers it references.

But the tracepoint API has its own API for that:
tracepoint_synchronize_unregister(). Use it instead as it's
self-explanatory and eases maintainance.
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
      669336e4
  3. 23 Jul, 2010 1 commit
  5. 22 Jul, 2010 3 commits
    • Dan Carpenter's avatar
      trace: strlen() return doesn't account for the NULL · 24a461d5
      Dan Carpenter authored 
      We need to add one to the strlen() return because of the NULL
character.  The type->name here generally comes from the kernel and I
don't think any of them come close to being MAX_TRACER_SIZE (100)
characters long so this is basically a cleanup.
Signed-off-by: default avatarDan Carpenter <error27@gmail.com>
LKML-Reference: <20100710100644.GV19184@bicker>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      24a461d5
    • David Daney's avatar
      tracing: Fix $mcount_regex for MIPS in recordmcount.pl · a484e54f
      David Daney authored 
      I found this issue in a locally patched 2.6.32.x, current kernels have
moved the offending code to an __init function which is skipped by
recordmcount.pl, so the bug is not currently being exercised.
However, I think the patch is still a good idea, to avoid future
problems if _mcount were to ever have its address taken in normal
code.

This is what I originally saw:

    Although arch/mips/kernel/ftrace.c is built without -pg, and thus
    contains no calls to _mcount, it does use the address of _mcount
    in ftrace_make_nop().  This was causing relocations to be emitted
    for _mcount which recordmcount.pl erronously took to be _mcount
    call sites.  The result was that the text of ftrace_make_nop()
    would be patched with garbage leading to a system crash.

In non-module code, all _mcount call sites will have R_MIPS_26
relocations, so we restrict $mcount_regex to only match on these.
Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
Acked-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
LKML-Reference: <1278712325-12050-1-git-send-email-ddaney@caviumnetworks.com>
Cc: Li Hong <lihong.hi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Matt Fleming <matt@console-pimps.org>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      a484e54f
    • Thomas Renninger's avatar
      x86 cpufreq, perf: Make trace_power_frequency cpufreq driver independent · 4c21adf2
      Thomas Renninger authored 
      and fix the broken case if a core's frequency depends on others.

trace_power_frequency was only implemented in a rather ungeneric
way in acpi-cpufreq driver's target() function only.

-> Move the call to trace_power_frequency to
   cpufreq.c:cpufreq_notify_transition() where CPUFREQ_POSTCHANGE
   notifier is triggered.
   This will support power frequency tracing by all cpufreq
   drivers.

trace_power_frequency did not trace frequency changes correctly
when the userspace governor was used or when CPU cores'
frequency depend on each other.

-> Moving this into the CPUFREQ_POSTCHANGE notifier and pass the cpu
   which gets switched automatically fixes this.

Robert Schoene provided some important fixes on top of my
initial quick shot version which are integrated in this patch:
- Forgot some changes in power_end trace (TP_printk/variable names)
- Variable dummy in power_end must now be cpu_id
- Use static 64 bit variable instead of unsigned int for cpu_id

[akpm@linux-foundation.org: build fix]
Signed-off-by: default avatarThomas Renninger <trenn@suse.de>
Cc: davej@codemonkey.org.uk
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Cc: Dave Jones <davej@codemonkey.org.uk>
Acked-by: default avatarArjan van de Ven <arjan@infradead.org>
Cc: Robert Schoene <robert.schoene@tu-dresden.de>
Tested-by: default avatarRobert Schoene <robert.schoene@tu-dresden.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      4c21adf2
  7. 21 Jul, 2010 17 commits
  9. 20 Jul, 2010 18 commits
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