On Mon, Jul 28, 2014 at 08:58:44AM +0200, Peter Zijlstra wrote: > On Fri, Jul 25, 2014 at 12:36:44PM -0300, Arnaldo Carvalho de Melo wrote: > > From: Adrian Hunter <adrian.hun...@intel.com> > > > > Intel PT decoding walks the object code to reconstruct the trace. A > > jump label change during tracing causes decoding errors. > > > > The "Enable close-on-exec flag on perf file descriptor" patch caused > > there to be always a jump label change. > > > > It was found that using a per-cpu context instead of a per-thread > > context for the probe of the close-on-exec feature, made the problem go > > away. > > per-cpu events are privileged, wouldn't this change make CLOEXEC always > undetected for normal users? > > Also, the $subject doesn't related to CLOEXEC at all.
right, it would.. Ingo, still any chance to skip this one? [jolsa@dhcp-26-214 perf]$ ./perf record sleep 1 perf_event_open(..., PERF_FLAG_FD_CLOEXEC) failed with unexpected error 13 (Permission denied) perf_event_open(..., 0) failed unexpectedly with error 13 (Permission denied) jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
