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authorPaolo Bonzini <pbonzini@redhat.com>2017-02-13 19:12:39 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2017-02-21 11:39:40 +0000
commitfed20a70e39bb9385020bdc4e8839d95326df8e2 (patch)
tree07af96e10e918b1393a1ea94205f8802f4a0d1df /util/trace-events
parent91bcea4899017891983b9149bd50cb283e78dfc0 (diff)
coroutine-lock: make CoMutex thread-safe
This uses the lock-free mutex described in the paper '"Blocking without Locking", or LFTHREADS: A lock-free thread library' by Gidenstam and Papatriantafilou. The same technique is used in OSv, and in fact the code is essentially a conversion to C of OSv's code. [Added missing coroutine_fn in tests/test-aio-multithread.c. --Stefan] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 20170213181244.16297-2-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'util/trace-events')
-rw-r--r--util/trace-events1
1 files changed, 1 insertions, 0 deletions
diff --git a/util/trace-events b/util/trace-events
index 65c978715a..ac27d94a97 100644
--- a/util/trace-events
+++ b/util/trace-events
@@ -28,6 +28,7 @@ qemu_coroutine_terminate(void *co) "self %p"
# util/qemu-coroutine-lock.c
qemu_co_queue_run_restart(void *co) "co %p"
+qemu_co_mutex_lock_uncontended(void *mutex, void *self) "mutex %p self %p"
qemu_co_mutex_lock_entry(void *mutex, void *self) "mutex %p self %p"
qemu_co_mutex_lock_return(void *mutex, void *self) "mutex %p self %p"
qemu_co_mutex_unlock_entry(void *mutex, void *self) "mutex %p self %p"