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Date: Fri, 6 Nov 2015 10:24:30 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com> Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>, Arnaldo Carvalho de Melo <acme@...nel.org>, Stephane Eranian <eranian@...il.com>, Russell King <linux@....linux.org.uk>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Michael Ellerman <mpe@...erman.id.au>, Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com> Subject: Re: [RFC PATCH 0/3]perf/core: extend perf_reg and perf_sample_regs_intr On Fri, Nov 06, 2015 at 12:57:17PM +0530, Madhavan Srinivasan wrote: > > > On Thursday 05 November 2015 06:37 PM, Peter Zijlstra wrote: > > On Thu, Nov 05, 2015 at 02:16:15AM +0530, Madhavan Srinivasan wrote: > >> Second patch updates struct arch_misc_reg for arch/powerpc with pmu registers > >> and adds offsetof macro for the same. It extends perf_reg_value() > >> to use reg idx to decide on struct to return value from. > > Why; what's in those regs? > > Was out and did not have access to mail, so missed to respond in time. > > In current implementation of patch 2, have added > few pmu control/status and counter registers, > which give additional information about the PMU context > for the sample. Yes, I saw that, you still haven't answered the question though. What is in those regs? Why is exposing that information like this the best option. -- 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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