Messages in this thread | | | Date | Thu, 22 Nov 2007 07:00:56 -0500 | From | Mathieu Desnoyers <> | Subject | Re: [PATCH] Linux Kernel Markers - Support Multiple Probes |
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* Christoph Hellwig (hch@infradead.org) wrote: > On Wed, Nov 21, 2007 at 10:41:26PM -0500, Mathieu Desnoyers wrote: > > RCU style multiple probes support for the Linux Kernel Markers. > > Why would we want this? >
If we want to have more than one probe connected to a marker at a given time (LTTng, or blktrace, ssytemtap) then we need this patch. Without it, connecting a second probe handler to a marker will fail.
It allow us, for instance, to do interesting combinations :
Do standard tracing with LTTng and, eventually, to compute statistics with SystemTAP, or to have a special trigger on an event that would call a systemtap script which would stop flight recorder tracing.
Mathieu
-- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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