linux-kernel - Re: [PATCH 2/2] rcuperf: Measure memory footprint during kfree

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Message-ID: <202001271653.IxODFuYS%lkp@intel.com>
Date:   Mon, 27 Jan 2020 16:51:10 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Joel Fernandes (Google)" <joel@...lfernandes.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Josh Triplett <josh@...htriplett.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "Paul E. McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>, urezki@...il.com
Subject: Re: [PATCH 2/2] rcuperf: Measure memory footprint during kfree_rcu()
 test (v4)

Hi "Joel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20200116]
[cannot apply to rcu/dev linux/master linus/master v5.5-rc6 v5.5-rc5 v5.5-rc4 v5.5]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Joel-Fernandes-Google/rcuperf-Add-support-to-vary-the-slab-object-sizes/20200117-101205
base:    2747d5fdab78f43210256cd52fb2718e0b3cce74
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-153-g47b6dfef-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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


sparse warnings: (new ones prefixed by >>)

>> kernel/rcu/rcuperf.c:620:11: sparse: sparse: symbol 'mem_begin' was not declared. Should it be static?

Please review and possibly fold the followup patch.

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation