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Date: Wed, 1 Nov 2017 18:17:26 +0800 From: "Wangnan (F)" <wangnan0@...wei.com> To: Namhyung Kim <namhyung@...nel.org> CC: <linux-kernel@...r.kernel.org>, <kan.liang@...el.com>, <acme@...nel.org>, <jolsa@...hat.com>, <kernel-team@....com> Subject: Re: [PATCH 2/2] perf record: Replace 'overwrite' by 'flightrecorder' for better naming On 2017/11/1 18:03, Namhyung Kim wrote: > On Wed, Nov 01, 2017 at 05:53:27AM +0000, Wang Nan wrote: >> The meaning of perf record's "overwrite" option and many "overwrite" in >> source code are not clear. In perf's code, the 'overwrite' has 2 meanings: >> 1. Make ringbuffer readonly (perf_evlist__mmap_ex's argument). >> 2. Set evsel's "backward" attribute (in apply_config_terms). >> >> perf record doesn't use meaning 1 at all, but have a overwrite option, its >> real meaning is setting backward. >> >> This patch separates these two concepts, introduce 'flightrecorder' mode >> which is what we really want. It combines these 2 concept together, wraps >> them into a record mode. In flight recorder mode, perf only dumps data before >> something happen. > I'm ok with the it but removing old name looks not good. How about > keeping them for a while (as deprecated)?. Is there a way to hide '--overwrite' from 'perf record --help' and print something when user really use it? > And 'flightrecorder' seems too long. Maybe you can use an acronym > like FDR or fdr-mode? fdr-mode is a good name. Thank you.
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