On 08/13/2014 08:37 AM, Namhyung Kim wrote: > On Tue, 12 Aug 2014 18:04:30 +0300, Adrian Hunter wrote: >> Fall back to probing with the current pid if cpu-wide >> probing fails. This primarily affects the setting of >> comm_exec flag when the user is un-privileged and >> /proc/sys/kernel/perf_event_paranoid > 0. The change >> to comm_exec can be observed by using -vv with >> perf record and a kernel that supports comm_exec. > > Maybe I'm missing something - why not just try process-wide probing in > the first place?
Same reason as patch 4 i.e. to avoid a jump label change when doing system-wide tracing. -- 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/
