| Date | Mon, 28 Jul 2014 08:58:44 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 02/27] perf tools: Fix jump label always changing during tracing |
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On Fri, Jul 25, 2014 at 12:36:44PM -0300, Arnaldo Carvalho de Melo wrote: > From: Adrian Hunter <adrian.hunter@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. [unhandled content-type:application/pgp-signature] |