CC: linux-kernel(a)vger.kernel.org TO: Lin Feng <linf(a)wangsu.com&gt; CC: Jens Axboe <axboe(a)kernel.dk&gt; CC: Jan Kara <jack(a)suse.cz&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dcc0b49040c70ad827a7f3d58a21b01fdb14e749 commit: 388c705b95f23f317fa43e6abf9ff07b583b721a bfq-iosched: Revert "bfq: Fix computation of shallow depth" date: 11 days ago config: x86_64-randconfig-a012-20210214 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 388c705b95f23f317fa43e6abf9ff07b583b721a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): terminate called after throwing an instance of 'std::system_error' what(): Resource temporarily unavailable PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace. #0 0x000055984dee4c8c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/cross/clang-c9439ca363/bin/lld+0x929c8c) #1 0x000055984dee2ac4 llvm::sys::RunSignalHandlers() (/opt/cross/clang-c9439ca363/bin/lld+0x927ac4) #2 0x000055984dee2c23 SignalHandler(int) (/opt/cross/clang-c9439ca363/bin/lld+0x927c23) #3 0x00007f64f8e09730 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12730) #4 0x00007f64f893b7bb raise (/lib/x86_64-linux-gnu/libc.so.6+0x377bb) #5 0x00007f64f8926535 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22535) #6 0x00007f64f8cf0983 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x8c983) #7 0x00007f64f8cf68c6 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x928c6) #8 0x00007f64f8cf6901 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x92901) #9 0x00007f64f8cf6b34 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x92b34) #10 0x00007f64f8cf2a55 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x8ea55) #11 0x00007f64f8d1fdc9 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbbdc9) #12 0x0000559850c6b1f1 std::thread::_State_impl<std::thread::_Invoker<std::tuple<llvm::parallel::detail::(anonymous namespace)::ThreadPoolExecutor::ThreadPoolExecutor(llvm::ThreadPoolStrategy)::'lambda'()> > >::_M_run() (/opt/cross/clang-c9439ca363/bin/lld+0x36b01f1) #13 0x00007f64f8d1fb2f (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbbb2f) #14 0x00007f64f8dfefa3 start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7fa3) #15 0x00007f64f89fd4cf clone (/lib/x86_64-linux-gnu/libc.so.6+0xf94cf) /bin/bash: line 1: 138867 Aborted ld.lld -m elf_x86_64 -r -o fs/ext4/ext4.o fs/ext4/balloc.o fs/ext4/bitmap.o fs/ext4/block_validity.o fs/ext4/dir.o fs/ext4/ext4_jbd2.o fs/ext4/extents.o fs/ext4/extents_status.o fs/ext4/file.o fs/ext4/fsmap.o fs/ext4/fsync.o fs/ext4/hash.o fs/ext4/ialloc.o fs/ext4/indirect.o fs/ext4/inline.o fs/ext4/inode.o fs/ext4/ioctl.o fs/ext4/mballoc.o fs/ext4/migrate.o fs/ext4/mmp.o fs/ext4/move_extent.o fs/ext4/namei.o fs/ext4/page-io.o fs/ext4/readpage.o fs/ext4/resize.o fs/ext4/super.o fs/ext4/symlink.o fs/ext4/sysfs.o fs/ext4/xattr.o fs/ext4/xattr_hurd.o fs/ext4/xattr_trusted.o fs/ext4/xattr_user.o fs/ext4/fast_commit.o fs/ext4/acl.o fs/ext4/xattr_security.o --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org