linux-kernel - [libbpf] 394b6e9238: last

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Date:   Tue, 24 Nov 2020 16:08:13 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Li RongQing <lirongqing@...du.com>
Cc:     0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
        lkp@...ts.01.org, netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [libbpf]  394b6e9238: last_state.incomplete


Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: 394b6e92389887aaf0ef8a2a70ef295b045c748b ("[PATCH] libbpf: add support for canceling cached_cons advance")
url: https://github.com/0day-ci/linux/commits/Li-RongQing/libbpf-add-support-for-canceling-cached_cons-advance/20201122-212415
base: https://git.kernel.org/cgit/linux/kernel/git/bpf/bpf-next.git master

in testcase: perf-sanity-tests
version: perf-x86_64-eccc87672492-1_20201111
with following parameters:

	perf_compiler: gcc
	ucode: 0xe2



on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>



In file included from xsk.c:35:
xsk.h: In function ▒~@...sk_ring_cons__cancel▒~@~Y:
xsk.h:159:2: error: ▒~@...x▒~@~Y undeclared (first use in this function)
  rx->cached_cons -= nb;
  ^~
xsk.h:159:2: note: each undeclared identifier is reported only once for each function it appears in
make[4]: *** [/usr/src/perf_selftests-x86_64-rhel-8.3-394b6e92389887aaf0ef8a2a70ef295b045c748b/tools/build/Makefile.build:97: staticobjs/xsk.o] Error 1
make[4]: *** Waiting for unfinished jobs....




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,
Oliver Sang


View attachment "config-5.10.0-rc3-00834-g394b6e923898" of type "text/plain" (170081 bytes)

View attachment "job-script" of type "text/plain" (5632 bytes)

View attachment "perf-sanity-tests" of type "text/plain" (15737 bytes)

View attachment "job.yaml" of type "text/plain" (4585 bytes)

View attachment "reproduce" of type "text/plain" (107 bytes)