> Hi, all. I just noticed that send_sigio() walks the task list,
> looking for the process(es) to send a signal to. This appears to be a
> potential scalability problem, as a large number of tasks is going to
> slow this down.
> I can think of one quick and simple hack to fix this for 90% (maybe
> 99%) of cases: record the task pointer at fcntl() time. Then at
> send_sigio() time, if the recorded pid and task match, skip the
> task list walk.
Alternatively, if pid>0 use find_task_by_pid, which uses the pid hash
instead.
Matthew.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/