linux-kernel - Re: [PATCH V12 05/10] arm64/perf: Add branch stack support in ARMV8 PMU

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Message-ID: <ZIwpma4SAJ/ZUyh5@arm.com>
Date:   Fri, 16 Jun 2023 10:21:29 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     kernel test robot <lkp@...el.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        will@...nel.org, mark.rutland@....com, llvm@...ts.linux.dev,
        oe-kbuild-all@...ts.linux.dev, Mark Brown <broonie@...nel.org>,
        James Clark <james.clark@....com>,
        Rob Herring <robh@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Suzuki Poulose <suzuki.poulose@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH V12 05/10] arm64/perf: Add branch stack support in ARMV8
 PMU

On Fri, Jun 16, 2023 at 06:57:52AM +0530, Anshuman Khandual wrote:
> On 6/16/23 05:12, kernel test robot wrote:
> > kernel test robot noticed the following build errors:
> > 
> > [auto build test ERROR on arm64/for-next/core]
> > [also build test ERROR on tip/perf/core acme/perf/core linus/master v6.4-rc6 next-20230615]
> > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > And when submitting patch, we suggest to use '--base' as documented in
> > https://git-scm.com/docs/git-format-patch#_base_tree_information]
> > 
> > url:    https://github.com/intel-lab-lkp/linux/commits/Anshuman-Khandual/drivers-perf-arm_pmu-Add-new-sched_task-callback/20230615-223352
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
> > patch link:    https://lore.kernel.org/r/20230615133239.442736-6-anshuman.khandual%40arm.com
> > patch subject: [PATCH V12 05/10] arm64/perf: Add branch stack support in ARMV8 PMU
> > config: arm-randconfig-r004-20230615 (https://download.01.org/0day-ci/archive/20230616/202306160706.Uei5XDoi-lkp@intel.com/config)
> > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> > reproduce (this is a W=1 build):
> >         mkdir -p ~/bin
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # install arm cross compiling tool for clang build
> >         # apt-get install binutils-arm-linux-gnueabi
> >         git remote add arm64 https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
> >         git fetch arm64 for-next/core
> >         git checkout arm64/for-next/core
> >         b4 shazam https://lore.kernel.org/r/20230615133239.442736-6-anshuman.khandual@arm.com
> >         # save the config file
> >         mkdir build_dir && cp config build_dir/.config
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm olddefconfig
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/perf/
> 
> I am unable to reproduce this on mainline 6.4-rc6 via default cross compiler
> on a W=1 build. Looking at all other problems reported on the file, it seems
> something is not right here. Reported build problems around these callbacks,
> i.e armv8pmu_branch_XXXX() do not make sense as they are available via config
> CONFIG_PERF_EVENTS which is also enabled along with CONFIG_ARM_PMUV3 in this
> test config.

Have you tried applying this series on top of the arm64 for-next/core
branch? That's what the robot it testing (in the absence of a --base
option when generating the patches).

-- 
Catalin