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Date: Tue, 26 Apr 2016 10:45:28 -0600 From: David Ahern <dsahern@...il.com> To: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>, Brendan Gregg <brendan.d.gregg@...il.com> Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>, Peter Zijlstra <peterz@...radead.org>, Frederic Weisbecker <fweisbec@...il.com>, Ingo Molnar <mingo@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Alexei Starovoitov <ast@...nel.org>, He Kuang <hekuang@...wei.com>, Jiri Olsa <jolsa@...hat.com>, Masami Hiramatsu <mhiramat@...nel.org>, Milian Wolff <milian.wolff@...b.com>, Namhyung Kim <namhyung@...nel.org>, Stephane Eranian <eranian@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, Vince Weaver <vincent.weaver@...ne.edu>, Wang Nan <wangnan0@...wei.com>, Zefan Li <lizefan@...wei.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH/RFC v3] perf core: Allow setting up max frame stack depth via sysctl On 4/26/16 10:33 AM, Arnaldo Carvalho de Melo wrote: > So, for completeness, further testing it to see how far it goes on a 8GB > machine I got: > > [root@...lia ~]# echo 131100 > /proc/sys/kernel/perf_event_max_stack > [root@...lia ~]# perf record -g ls > Error: > The sys_perf_event_open() syscall returned with 12 (Cannot allocate memory) for event (cycles). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured? I thought we fixed up the last line to not display for errors like this. How about adding ENOMEM case to perf_evsel__open_strerror?
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