performance: 0.877 device: 0.837 graphic: 0.816 debug: 0.661 vnc: 0.528 files: 0.488 boot: 0.477 network: 0.438 semantic: 0.396 ppc: 0.374 i386: 0.313 risc-v: 0.307 socket: 0.297 arm: 0.277 TCG: 0.249 PID: 0.229 x86: 0.216 permissions: 0.188 register: 0.174 mistranslation: 0.135 user-level: 0.114 peripherals: 0.104 architecture: 0.102 virtual: 0.094 VMM: 0.082 hypervisor: 0.052 kernel: 0.050 assembly: 0.026 KVM: 0.019 Data races in test-bdrv-drain test Description of problem: Data races in the access of `Job` fields in the `test-bdrv-drain` test were identified using TSAN. Steps to reproduce: ```sh QEMU_BUILD_DIR= QEMU_DIR= configure --enable-tsan --cc=clang --cxx=clang++ --enable-trace-backends=ust --enable-fdt=system --disable-slirp make tests/unit/test-bdrv-drain MALLOC_PERTURB_=186 G_TEST_SRCDIR=$QEMU_BUILD_DIR/tests/unit G_TEST_BUILDDIR=$QEMU_BUILD_DIR/tests/unit $QEMU_BUILD_DIR/tests/unit/test-bdrv-drain --tap -k ```