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Date: Mon, 11 May 2015 11:30:10 +0200 From: Ingo Molnar <mingo@...nel.org> To: He Kuang <hekuang@...wei.com> Cc: masami.hiramatsu.pt@...achi.com, a.p.zijlstra@...llo.nl, acme@...nel.org, jolsa@...nel.org, mingo@...hat.com, wangnan0@...wei.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 3/3] perf probe: Show better error message when failed to find variable * He Kuang <hekuang@...wei.com> wrote: > Indicate to check variable location range in error message when we got > failed to find the variable. > > Before this patch: > > $ perf probe --add 'generic_perform_write+118 bytes' > Failed to find the location of bytes at this address. > Perhaps, it has been optimized out. > Error: Failed to add events. > > After this patch: > $ perf probe --add 'generic_perform_write+118 bytes' > Failed to find the location of bytes at this address. What does this sentence mean? I thought 'address' means 'location of bytes'. So the address identifies the location and obviously we know that. So this message wants to say something else. > Perhaps, it has been optimized out. > Use -V with --range option to show variable location range. This suggestion is useful. > Error: Failed to add events. Thanks, 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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