tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 190bf7b14b0cf3df19c059061be032bd8994a597
commit: be45a4902c7caa717fee6b2f671e59b396ed395c mm/swap: cache maximum swapfile size when init swap
date: 11 months ago
config: mips-randconfig-r014-20230811 (https://download.01.org/0day-ci/archive/20230812/[email protected]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230812/[email protected]/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All errors (new ones prefixed by >>):
>> Cannot find symbol for section 69: .text.arch_max_swapfile_size.
mm/swapfile.o: failed
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
On Sat, Aug 12, 2023 at 09:11:33AM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 190bf7b14b0cf3df19c059061be032bd8994a597
> commit: be45a4902c7caa717fee6b2f671e59b396ed395c mm/swap: cache maximum swapfile size when init swap
> date: 11 months ago
> config: mips-randconfig-r014-20230811 (https://download.01.org/0day-ci/archive/20230812/[email protected]/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> reproduce: (https://download.01.org/0day-ci/archive/20230812/[email protected]/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <[email protected]>
> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
>
> All errors (new ones prefixed by >>):
>
> >> Cannot find symbol for section 69: .text.arch_max_swapfile_size.
> mm/swapfile.o: failed
Hmm.. I don't really know what's the issue here, neither can I reproduce
this locally - the cross build seems to all work with the reproducer and I
can see mm/swapfile.o correctly generated.
$ wget https://download.01.org/0day-ci/archive/20230812/[email protected]/config
$ mv config .config
$ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ./make.cross W=1 O=build_dir ARCH=mips olddefconfig
[...]
$ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ./make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash
[...]
FIT description: Linux 6.5.0-rc4-00492-gad3232df3e41
Created: Mon Aug 14 11:35:57 2023
Image 0 (kernel)
Description: Linux 6.5.0-rc4-00492-gad3232df3e41
Created: Mon Aug 14 11:35:57 2023
Type: Kernel Image
Compression: gzip compressed
Data Size: 1767982 Bytes = 1726.54 KiB = 1.69 MiB
Architecture: MIPS
OS: Linux
Load Address: 0x80100000
Entry Point: 0x8043e5f0
Hash algo: sha1
Hash value: 750e28c2fdd0d73eec9b0d8dbf5655579cb1364c
Default Configuration: 'conf-default'
Configuration 0 (conf-default)
Description: Generic Linux kernel
Kernel: kernel
$ file build_dir/mm/swapfile.o
build_dir/mm/swapfile.o: ELF 32-bit MSB relocatable, MIPS, MIPS32 version 1 (SYSV), not stripped
Please let me now if anyone knows what I'm missing.
--
Peter Xu
On Mon, Aug 14, 2023 at 11:38:18AM -0400, Peter Xu wrote:
> On Sat, Aug 12, 2023 at 09:11:33AM +0800, kernel test robot wrote:
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head: 190bf7b14b0cf3df19c059061be032bd8994a597
> > commit: be45a4902c7caa717fee6b2f671e59b396ed395c mm/swap: cache maximum swapfile size when init swap
> > date: 11 months ago
> > config: mips-randconfig-r014-20230811 (https://download.01.org/0day-ci/archive/20230812/[email protected]/config)
> > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> > reproduce: (https://download.01.org/0day-ci/archive/20230812/[email protected]/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <[email protected]>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> >
> > All errors (new ones prefixed by >>):
> >
> > >> Cannot find symbol for section 69: .text.arch_max_swapfile_size.
> > mm/swapfile.o: failed
>
> Hmm.. I don't really know what's the issue here, neither can I reproduce
> this locally - the cross build seems to all work with the reproducer and I
> can see mm/swapfile.o correctly generated.
This is https://github.com/ClangBuiltLinux/linux/issues/1830 and
https://github.com/ClangBuiltLinux/linux/issues/981, which is a bug in
recordmcount with regards to section symbols that occurs when building
with clang's integrated assembler. It happens when the there are only
weak symbols in a .text section, which occurs more often with MIPS due
to LD_DEAD_CODE_DATA_ELIMINATION implying -ffunction-sections (i.e., any
__weak symbol will trigger this) and I can see this randconfig setting
it.
Unfortunately, the robot seems to have tripped over this a lot over the
weekend :/ Intel folks, can this type of warning please be added to your
filter for at least MIPS + LD_DEAD_CODE_DATA_ELIMINATION so that people
don't get bothered?
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/[email protected]/
https://lore.kernel.org/[email protected]/
Cheers,
Nathan