1. Suppose you're tracing task t with engine e, and
e->ops->report_quiesce is non-NULL. Will utrace ever call
e->ops->report_quiesce from a task other than t? If so, under what
circumstances?
2. Suppose some thread t2 (t != t2) does:
A:
utrace_set_events(t, e, UTRACE_EVENT(QUIESCE));
B:
result = utrace_control(t, e, UTRACE_STOP);
C:
Suppose t was already stopped at point A, and remains stopped
through point C. My understanding is that e->ops->report_quiesce
will get called before t returns to user space (but only from t,
not t2). Is that correct?
(I ask partly because in previous versions of utrace, calling
utrace_set_flags(t, e, UTRACE_ACTION_QUIESCE | UTRACE_EVENT(QUIESCE))
from t2 could yield a call to e->ops->report_quiesce from t2.)
Thanks.
Jim
