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Date: Mon, 11 Jan 2016 18:55:03 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Wang Nan <wangnan0@...wei.com> Cc: linux-kernel@...r.kernel.org, pi3orama@....com, lizefan@...wei.com, netdev@...r.kernel.org, davem@...emloft.net Subject: Re: [PATCH 14/53] perf test: Check environment before start real BPF test Em Mon, Jan 11, 2016 at 01:48:05PM +0000, Wang Nan escreveu: > Copying perf to old kernel system results: > > # perf test bpf > 37: Test BPF filter : > 37.1: Test basic BPF filtering : FAILED! > 37.2: Test BPF prologue generation : Skip > > However, in case when kernel doesn't support a test case it should > return 'Skip', 'FAILED!' should be reserved for kernel tests for when > the kernel supports a feature that then fails to work as advertised. > > This patch checks environment before real testcase. This is really strange, this other test is failing if the above patch is present, found by bisecting: [acme@...icio linux]$ perf test decoder 47: Test x86 instruction decoder - new instructions : FAILED! [acme@...icio linux]$ git log --oneline -1 91fedd318e3d perf test: Check environment before start real BPF test [acme@...icio linux]$ git reset --hard HEAD^ HEAD is now at f1f23526d3b6 perf test: Reset err after using it hold errcode in hist testcases [acme@...icio linux]$ m make: Entering directory `/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build CC /tmp/build/perf/arch/common.o CC /tmp/build/perf/util/abspath.o CC /tmp/build/perf/builtin-bench.o CC /tmp/build/perf/util/alias.o <SNIP> [acme@...icio linux]$ git log --oneline -1 f1f23526d3b6 perf test: Reset err after using it hold errcode in hist testcases [acme@...icio linux]$ perf test decoder 47: Test x86 instruction decoder - new instructions : Ok [acme@...icio linux]$
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