On 29/11/2023 21:26, Stefan Hajnoczi wrote:
The Big QEMU Lock (BQL) has many names and they are confusing. The actual QemuMutex variable is called qemu_global_mutex but it's commonly referred to as the BQL in discussions and some code comments. The locking APIs, however, are called qemu_mutex_lock_iothread() and qemu_mutex_unlock_iothread(). The "iothread" name is historic and comes from when the main thread was split into into KVM vcpu threads and the "iothread" (now called the main loop thread). I have contributed to the confusion myself by introducing a separate --object iothread, a separate concept unrelated to the BQL. The "iothread" name is no longer appropriate for the BQL. Rename the locking APIs to: - void qemu_bql_lock(void) - void qemu_bql_unlock(void) - bool qemu_bql_locked(void) There are more APIs with "iothread" in their names. Subsequent patches will rename them. There are also comments and documentation that will be updated in later patches. Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx> --- include/block/aio-wait.h | 2 +- include/qemu/main-loop.h | 26 +++--- accel/accel-blocker.c | 10 +-- accel/dummy-cpus.c | 8 +- accel/hvf/hvf-accel-ops.c | 4 +- accel/kvm/kvm-accel-ops.c | 4 +- accel/kvm/kvm-all.c | 22 ++--- accel/tcg/cpu-exec.c | 26 +++--- accel/tcg/cputlb.c | 16 ++-- accel/tcg/tcg-accel-ops-icount.c | 4 +- accel/tcg/tcg-accel-ops-mttcg.c | 12 +-- accel/tcg/tcg-accel-ops-rr.c | 14 ++-- accel/tcg/tcg-accel-ops.c | 2 +- accel/tcg/translate-all.c | 2 +- cpu-common.c | 4 +- dump/dump.c | 4 +- hw/core/cpu-common.c | 6 +- hw/i386/intel_iommu.c | 6 +- hw/i386/kvm/xen_evtchn.c | 16 ++-- hw/i386/kvm/xen_overlay.c | 2 +- hw/i386/kvm/xen_xenstore.c | 2 +- hw/intc/arm_gicv3_cpuif.c | 2 +- hw/intc/s390_flic.c | 18 ++-- hw/misc/edu.c | 4 +- hw/misc/imx6_src.c | 2 +- hw/misc/imx7_src.c | 2 +- hw/net/xen_nic.c | 8 +- hw/ppc/pegasos2.c | 2 +- hw/ppc/ppc.c | 4 +- hw/ppc/spapr.c | 2 +- hw/ppc/spapr_rng.c | 4 +- hw/ppc/spapr_softmmu.c | 4 +- hw/remote/mpqemu-link.c | 12 +-- hw/remote/vfio-user-obj.c | 2 +- hw/s390x/s390-skeys.c | 2 +- migration/block-dirty-bitmap.c | 4 +- migration/block.c | 16 ++-- migration/colo.c | 60 +++++++------- migration/dirtyrate.c | 12 +-- migration/migration.c | 52 ++++++------ migration/ram.c | 12 +-- replay/replay-internal.c | 2 +- semihosting/console.c | 8 +- stubs/iothread-lock.c | 6 +- system/cpu-throttle.c | 4 +- system/cpus.c | 28 +++---- system/dirtylimit.c | 4 +- system/memory.c | 2 +- system/physmem.c | 8 +- system/runstate.c | 2 +- system/watchpoint.c | 4 +- target/arm/arm-powerctl.c | 14 ++-- target/arm/helper.c | 4 +- target/arm/hvf/hvf.c | 8 +- target/arm/kvm.c | 4 +- target/arm/kvm64.c | 4 +- target/arm/ptw.c | 6 +- target/arm/tcg/helper-a64.c | 8 +- target/arm/tcg/m_helper.c | 4 +- target/arm/tcg/op_helper.c | 24 +++--- target/arm/tcg/psci.c | 2 +- target/hppa/int_helper.c | 8 +- target/i386/hvf/hvf.c | 6 +- target/i386/kvm/hyperv.c | 4 +- target/i386/kvm/kvm.c | 28 +++---- target/i386/kvm/xen-emu.c | 14 ++-- target/i386/nvmm/nvmm-accel-ops.c | 4 +- target/i386/nvmm/nvmm-all.c | 20 ++--- target/i386/tcg/sysemu/fpu_helper.c | 6 +- target/i386/tcg/sysemu/misc_helper.c | 4 +- target/i386/whpx/whpx-accel-ops.c | 4 +- target/i386/whpx/whpx-all.c | 24 +++--- target/loongarch/csr_helper.c | 4 +- target/mips/kvm.c | 4 +- target/mips/tcg/sysemu/cp0_helper.c | 4 +- target/openrisc/sys_helper.c | 16 ++-- target/ppc/excp_helper.c | 12 +-- target/ppc/kvm.c | 4 +- target/ppc/misc_helper.c | 8 +- target/ppc/timebase_helper.c | 8 +- target/s390x/kvm/kvm.c | 4 +- target/s390x/tcg/misc_helper.c | 118 +++++++++++++-------------- target/sparc/int32_helper.c | 2 +- target/sparc/int64_helper.c | 6 +- target/sparc/win_helper.c | 20 ++--- target/xtensa/exc_helper.c | 8 +- ui/spice-core.c | 4 +- util/async.c | 2 +- util/main-loop.c | 8 +- util/rcu.c | 14 ++-- audio/coreaudio.m | 4 +- memory_ldst.c.inc | 18 ++-- target/i386/hvf/README.md | 2 +- ui/cocoa.m | 50 ++++++------ 94 files changed, 502 insertions(+), 502 deletions(-)
Reviewed-by: Paul Durrant <paul@xxxxxxx>
