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perf/core improvements and fixes:

Browse source 
User visible:
 
 - The mmap address range for the ring buffer now is calculated using the
   contents of /proc/sys/kernel/perf_event_mlock_kb.
 
   This fixes an -EPERM case where 'trace' was trying to use more than what
   is configured on perf_event_mlock_kb. (Arnaldo Carvalho de Melo)
 
 Infrastructure:
 
 - Move bitops definitions so that they match the header file hierarchy
   in the kernel sources where that code came from. (Arnaldo Carvalho de Melo)
 
 - Adopt round{down,up}_pow_of_two from the kernel and use it instead of
   equivalent code, so that we reuse more kernel code and make tools/ look
   more like kernel source code, to encourage further contributions from
   kernel hackers (Arnaldo Carvalho de Melo)
 
 - Fix use after free in filename__read_build_id (Mitchell Krome)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

- The mmap address range for the ring buffer now is calculated using the
  contents of /proc/sys/kernel/perf_event_mlock_kb.

  This fixes an -EPERM case where 'trace' was trying to use more than what
  is configured on perf_event_mlock_kb. (Arnaldo Carvalho de Melo)

Infrastructure changes:

- Move bitops definitions so that they match the header file hierarchy
  in the kernel sources where that code came from. (Arnaldo Carvalho de Melo)

- Adopt round{down,up}_pow_of_two from the kernel and use it instead of
  equivalent code, so that we reuse more kernel code and make tools/ look
  more like kernel source code, to encourage further contributions from
  kernel hackers (Arnaldo Carvalho de Melo)

- Fix use after free in filename__read_build_id (Mitchell Krome)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2014-12-18 07:23:55 +01:00
commit 6aaba7c901
17 changed files with 525 additions and 207 deletions
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