On Sun, 20 Aug 2006 18:53:21 +0400
Oleg Nesterov <[email protected]> wrote:
> copy_process:
> // holds tasklist_lock + ->siglock
> /*
> * inherit ioprio
> */
> p->ioprio = current->ioprio;
>
> Why? ->ioprio was already copied in dup_task_struct().
It might just be a thinko.
> I guess this is needed
> to ensure that the child can't escape sys_ioprio_set(IOPRIO_WHO_{PGRP,USER}),
> yes?
How could the child escape that if this assignment was not present?
> In that case we don't need ->siglock held, and the comment should be updated.
Surely.
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