diff options
| author | Lluís Vilanova <vilanova@ac.upc.edu> | 2016-12-26 22:24:40 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2017-01-16 13:40:56 +0000 |
| commit | 82e95ec847757c1a2b6accf0e8312925ada3dca8 (patch) | |
| tree | c216df66c35a995786021fce24a2b830d15c0757 /trace | |
| parent | fff895dfdbe41965f7b0430e3d9e8b7bd8fc8eda (diff) | |
trace: Fix dynamic event state on vCPU hot-unplug
We need to disable per-vCPU events on a vCPU that is hot-unplugged to
keep the dynamic event state global counters consistent.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 148278748055.1404.1570530281528619895.stgit@fimbulvetr.bsc.es
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
| -rw-r--r-- | trace/control.c | 16 | ||||
| -rw-r--r-- | trace/control.h | 8 |
2 files changed, 24 insertions, 0 deletions
diff --git a/trace/control.c b/trace/control.c index 1a7bee6ddc..cb79bb17ec 100644 --- a/trace/control.c +++ b/trace/control.c @@ -259,6 +259,22 @@ void trace_init_file(const char *file) #endif } +void trace_fini_vcpu(CPUState *vcpu) +{ + TraceEventIter iter; + TraceEvent *ev; + + trace_event_iter_init(&iter, NULL); + while ((ev = trace_event_iter_next(&iter)) != NULL) { + if (trace_event_is_vcpu(ev) && + trace_event_get_state_static(ev) && + trace_event_get_vcpu_state_dynamic(vcpu, ev)) { + /* must disable to affect the global counter */ + trace_event_set_vcpu_state_dynamic(vcpu, ev, false); + } + } +} + bool trace_init_backends(void) { #ifdef CONFIG_TRACE_SIMPLE diff --git a/trace/control.h b/trace/control.h index ccaeac8552..4ea53e2986 100644 --- a/trace/control.h +++ b/trace/control.h @@ -202,6 +202,14 @@ void trace_init_file(const char *file); void trace_init_vcpu(CPUState *vcpu); /** + * trace_fini_vcpu: + * @vcpu: Removed vCPU. + * + * Disable dynamic event state for a hot-unplugged vCPU. + */ +void trace_fini_vcpu(CPUState *vcpu); + +/** * trace_list_events: * * List all available events. |