On a Friday in 2020, Lin Ma wrote:
While we set up perf events for a shutoff domain and check the settings, All of perf events are reported as 'disabled', unless we add --config, This is redundant for a shutoff domain.
# virsh domstate $GUEST shut off
# virsh perf --domain $GUEST cmt : disabled mbmt : disabled mbml : disabled ......
# virsh perf --domain $GUEST --enable mbmt mbmt : enabled
# virsh perf --domain $GUEST cmt : disabled mbmt : disabled mbml : disabled ......
Use virDomainObjGetOneDefState instead of virDomainObjGetOneDef to fix the issue. After patch, The perf event status of a shutoff domain is reported correctly:
# virsh domstate $GUEST shut off
# virsh perf --domain $GUEST cmt : disabled mbmt : disabled mbml : disabled ......
# virsh perf --domain $GUEST --enable mbmt mbmt : enabled
# virsh perf --domain $GUEST cmt : disabled mbmt : enabled mbml : disabled ......
Signed-off-by: Lin Ma <lma@suse.de> --- src/qemu/qemu_driver.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
Reviewed-by: Ján Tomko <jtomko@redhat.com> Jano