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Date: Tue, 11 May 2010 08:51:31 +0200 From: Ingo Molnar <mingo@...e.hu> To: Lin Ming <ming.m.lin@...el.com> Cc: Peter Zijlstra <peterz@...radead.org>, Frederic Weisbecker <fweisbec@...il.com>, "eranian@...il.com" <eranian@...il.com>, "Gary.Mohr@...l.com" <Gary.Mohr@...l.com>, Corey Ashford <cjashfor@...ux.vnet.ibm.com>, "arjan@...ux.intel.com" <arjan@...ux.intel.com>, "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>, Paul Mackerras <paulus@...ba.org>, "David S. Miller" <davem@...emloft.net>, Russell King <rmk+kernel@....linux.org.uk>, Paul Mundt <lethal@...ux-sh.org>, lkml <linux-kernel@...r.kernel.org> Subject: Re: [RFC][PATCH 2/9] perf: core, remove hw_perf_event_init * Lin Ming <ming.m.lin@...el.com> wrote: > On Tue, 2010-05-11 at 14:38 +0800, Peter Zijlstra wrote: > > On Tue, 2010-05-11 at 01:09 +0200, Frederic Weisbecker wrote: > > > > > Which module do you have in mind that could register a pmu? > > > And I don't understand the problem with pci-hotplug. > > > > Well, the DRM drivers for one, but basically the trend is for every > > aspect of the machine to include PMUs of some form, this includes bus > > bridges and fancy devices. > > So the concept of "PMU" is really broadened here? > Not just only the performance monitoring hardware in CPU? We _really_ dont want to call it a 'PMU' but 'events coming from an event source'. The reason is that a PMU is an existing term that is quite attached to a CPU - while many hardware events come not from a PMU. Interrupts, error conditions, hotplug events, etc. etc. Furthermore, the name 'PMU' is even less correct for software events. So lets stick with 'events' and with some container that originates them. (event_source) Ok? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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