diff options
author | Stefan Hajnoczi <stefanha@redhat.com> | 2024-01-02 10:35:25 -0500 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2024-01-08 10:45:43 -0500 |
commit | 195801d700c008b6a8d8acfa299aa5f177446647 (patch) | |
tree | 7ab423e4a773b818f6c6d65f2fa06dc4517cad24 /util/main-loop.c | |
parent | 897a06c6d7ce8fb962a33cea1910d17218c746e9 (diff) | |
download | qemu-195801d700c008b6a8d8acfa299aa5f177446647.zip qemu-195801d700c008b6a8d8acfa299aa5f177446647.tar.gz qemu-195801d700c008b6a8d8acfa299aa5f177446647.tar.bz2 |
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>
Diffstat (limited to 'util/main-loop.c')
-rw-r--r-- | util/main-loop.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/util/main-loop.c b/util/main-loop.c index 63b4cda..a0386cf 100644 --- a/util/main-loop.c +++ b/util/main-loop.c @@ -299,13 +299,13 @@ static int os_host_main_loop_wait(int64_t timeout) glib_pollfds_fill(&timeout); - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_unlock(); ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout); replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); glib_pollfds_poll(); @@ -514,7 +514,7 @@ static int os_host_main_loop_wait(int64_t timeout) poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_unlock(); @@ -522,7 +522,7 @@ static int os_host_main_loop_wait(int64_t timeout) replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); if (g_poll_ret > 0) { for (i = 0; i < w->num; i++) { w->revents[i] = poll_fds[n_poll_fds + i].revents; |