qemu/replay
Stefan Hajnoczi 195801d700 system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()
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 bql_lock(void)
- void bql_unlock(void)
- bool 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@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Acked-by: Fabiano Rosas <farosas@suse.de>
Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Peter Xu <peterx@redhat.com>
Acked-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Acked-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-id: 20240102153529.486531-2-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2024-01-08 10:45:43 -05:00
..
meson.build meson: Replace softmmu_ss -> system_ss 2023-06-20 10:01:30 +02:00
replay-audio.c
replay-char.c chardev: src buffer const for write functions 2022-09-29 14:38:05 +04:00
replay-debugging.c block: remove AioContext locking 2023-12-21 22:49:27 +01:00
replay-events.c replay: simplify async event processing 2022-06-06 09:26:53 +02:00
replay-input.c ui: add the infrastructure to support MT events 2023-05-28 13:08:25 +04:00
replay-internal.c system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2024-01-08 10:45:43 -05:00
replay-internal.h replay: Fix declaration of replay_read_next_clock 2022-11-29 11:09:11 -05:00
replay-net.c
replay-random.c
replay-snapshot.c replay: Constify VMState 2023-12-30 07:38:06 +11:00
replay-time.c cleanup: Tweak and re-run return_directly.cocci 2022-12-14 16:19:35 +01:00
replay.c accel/tcg/tcg-accel-ops-rr: ensure fairness with icount 2023-05-11 09:53:41 +01:00
stubs-system.c replay: Simplify setting replay blockers 2023-02-23 14:10:17 +01:00