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Message-ID: <20181105053635.GS24195@shao2-debian>
Date: Mon, 5 Nov 2018 13:36:35 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Yonghong Song <yhs@...com>
Cc: Alexei Starovoitov <ast@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [LKP] [tools/bpf] f6f3bac08f: stderr.failed_to_prepare_for_bpf
FYI, we noticed the following commit (built with gcc-7):
commit: f6f3bac08ff9855d803081a353a1fafaa8845739 ("tools/bpf: bpftool: add net support")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: bpf_offload
with following parameters:
ucode: 0xb00002e
on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
KERNEL SELFTESTS: linux_headers_dir is /usr/src/linux-headers-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739
2018-11-03 10:11:02 cd /usr/src/linux-selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/testing/selftests
2018-11-03 10:11:02 ln -sf /usr/bin/clang-7 /usr/bin/clang
2018-11-03 10:11:02 ln -sf /usr/bin/llc-7 /usr/bin/llc
make: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf'
Auto-detecting system features:
... libbfd: [ .[31mOFF.[m ]
... disassembler-four-args: [ .[31mOFF.[m ]
CC bpf_jit_disasm.o
LINK bpf_jit_disasm
CC bpf_dbg.o
LINK bpf_dbg
CC bpf_asm.o
BISON bpf_exp.yacc.c
CC bpf_exp.yacc.o
FLEX bpf_exp.lex.c
CC bpf_exp.lex.o
LINK bpf_asm
DESCEND bpftool
make[1]: Entering directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf/bpftool'
Auto-detecting system features:
... libbfd: [ .[31mOFF.[m ]
... disassembler-four-args: [ .[31mOFF.[m ]
CC map_perf_ring.o
CC xlated_dumper.o
CC perf.o
CC prog.o
CC btf_dumper.o
CC net.o
CC netlink_dumper.o
Makefile:96: recipe for target 'netlink_dumper.o' failed
make[1]: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf/bpftool'
Makefile:99: recipe for target 'bpftool' failed
make: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.2-f6f3bac08ff9855d803081a353a1fafaa8845739/tools/bpf'
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
Thanks,
Rong Chen
View attachment "config-4.19.0-rc2-00335-gf6f3bac" of type "text/plain" (167715 bytes)
View attachment "job-script" of type "text/plain" (4790 bytes)
Download attachment "kmsg.xz" of type "application/x-xz" (22676 bytes)
View attachment "bpf_offload" of type "text/plain" (1645 bytes)
View attachment "job.yaml" of type "text/plain" (4008 bytes)
View attachment "reproduce" of type "text/plain" (184 bytes)
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