Re: [GIT PULL 00/30] perf/core improvements and fixes

[Namhyung Kim <namhyung@kernel.org>]

Hi Arnaldo,

On Fri, May 08, 2015 at 05:56:12PM -0300, Arnaldo Carvalho de Melo wrote:
> Hi Ingo,
> 
> 	Please consider pulling,
> 
> - Arnaldo
> 
> 
> 
> The following changes since commit cb307113746b4d184155d2c412e8069aeaa60d42:
> 
>   perf_event: Don't allow vmalloc() backed perf on powerpc (2015-05-08 12:26:01 +0200)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo
> 
> for you to fetch changes up to 76d408498b08447e0f61dfdd611aeb6e8e61ce80:
> 
>   perf build: Disable libdw DWARF unwind when built with NO_DWARF (2015-05-08 16:43:14 -0300)
> 
> ----------------------------------------------------------------
> perf/core improvements and fixes:
> 
> User visible:
> 
> - 'perf probe' improvements (Masami Hiramatsu)
> 
>   - Support glob wildcards for function name
>   - Support $params special probe argument: Collect all function arguments
>   - Make --line checks validate C-style function name.
>   - Add --no-inlines option to avoid searching inline functions
> 
> - Introduce new 'perf bench futex' benchmark: 'wake-parallel', to
>   measure parallel waker threads generating contention for kerne
>   locks (hb->lock) (Davidlohr Bueso)
> 
> Bug fixes:
> 
> - 'perf top' survives much longer on high core count machines, more work
>   needed to refcount more data structures besides 'struct thread' and fix
>   more races (Arnaldo Carvalho de Melo)

I'm seeing a segfault on 'perf report' with a large data file after
applying thread refcount change - it happens regardless of the atomic
operation.

Thanks,
Namhyung