After cprload, the guest console misbehaves. You must type 8 characters
before any are echoed to the terminal. Qemu was not sending interrupts
to the guest because the QEMU_CLOCK_VIRTUAL timers_state.cpu_clock_offset
was bad. The offset is usually updated at cprsave time by the path
save_cpr_snapshot()
vm_stop()
do_vm_stop()
if (runstate_is_running())
cpu_disable_ticks();
timers_state.cpu_clock_offset = cpu_get_clock_locked();
However, if the guest is in RUN_STATE_SUSPENDED, then cpu_disable_ticks is
not called. Further, the earlier transition to suspended in
qemu_system_suspend did not disable ticks. To fix, call cpu_disable_ticks
from save_cpr_snapshot.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
---
migration/savevm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/migration/savevm.c b/migration/savevm.c
index f101039..00f493b 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2729,6 +2729,11 @@ void save_cpr_snapshot(const char *file, const char
*mode, Error **errp)
return;
}
+ /* Update timers_state before saving. Suspend did not so do. */
+ if (runstate_check(RUN_STATE_SUSPENDED)) {
+ cpu_disable_ticks();
+ }
+
vm_stop(RUN_STATE_SAVE_VM);
ret = qemu_savevm_state(f, op, errp);
--
1.8.3.1
