On 08/19, Roland McGrath wrote:
Wait. It doesn't break this. It only breaks -EALREADY contract. And
I don't understand why this is bad.
The -EALREADY contract lets you have a report_death callback that does all
your cleanup and then returns UTRACE_DETACH.
I think this is possible without
On 08/17, Oleg Nesterov wrote:
On 08/16, Roland McGrath wrote:
The problem is, utrace_control(DETACH) does nothing and returns
-EALREADY if utrace-death is set, this is not right. We can and
should detach in this case, we only should skip utrace_reset() to
avoid the race with
Suppose that we want to detach the engine and free engine-data. To
avoid the races with our calbacks which can use -data we should do
either
err = utrace_set_events(0);
if (err == ...)
utrace_barrier();
utrace_control(DETACH);
or
err =
The problem is, utrace_control(DETACH) does nothing and returns
-EALREADY if utrace-death is set, this is not right. We can and
should detach in this case, we only should skip utrace_reset() to
avoid the race with utrace_report_death()-REPORT_CALLBACKS().
This behavior is the original
