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Date: Sat, 28 Nov 2015 09:21:24 +0800 From: "Wangnan (F)" <wangnan0@...wei.com> To: Arnaldo Carvalho de Melo <acme@...nel.org> CC: Alexei Starovoitov <ast@...nel.org>, <linux-kernel@...r.kernel.org>, Adrian Hunter <adrian.hunter@...el.com>, Peter Zijlstra <peterz@...radead.org>, David Ahern <dsahern@...il.com>, Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, Brendan Gregg <brendan.d.gregg@...il.com>, <lizefan@...wei.com>, <pi3orama@....com>, He Kuang <hekuang@...wei.com> Subject: Re: RFC Re: [PATCH v2 04/13] perf tools: Add API to config maps in bpf object On 2015/11/28 9:20, Wangnan (F) wrote: > > > On 2015/11/28 9:10, Arnaldo Carvalho de Melo wrote: >> Em Fri, Nov 27, 2015 at 08:47:38AM +0000, Wang Nan escreveu: >>> bpf__config_obj() is introduced as a core API to config BPF object >>> after loading. One configuration option of maps is introduced. After >>> this patch BPF object can accept configuration like: >>> >>> maps:my_map:value=1234 >>> >>> (maps.my_map.value looks pretty. However, there's a small but hard >>> to fixed problem related to flex's greedy matching. Please see [1]. >>> Choose ':' to avoid it in a simpler way.) >> Understood the issues, but I would like to hear from Ingo, Jiri, >> Namhyung, Brian and others here, since we're setting up syntax, and yes, >> using: >> maps.my_map.value[0,3...6]=1234; >> >> or even: >> >> maps->my_map->value[0,3...6]=1234; >> >> Looks more natural than: >> >> maps:my_map:value[0,3...6]=1234; > > You don't mention maps::my_map::value. C++ use '::' this way, so I think > it is also a possible choice. > > Or we can use another character for example '|' to replace '/' in case we > have a map starting with 'c' or 'o'. For example: > > ./mybpf.c|maps.channel.value=1234| > > and in normal case still support '/': > > ./mybpf.c/maps.channel.value=1234/ Should be: ./mybpf.c/maps.mymap.value=1234/ > > like 'sed': > > # sed 's/a/b/g' > a > b > # sed 's+/+|+g' > / > | > > Thank you. -- 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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