Re: [Hdaps-devel] Re: HDAPS, Need to park the head for real
From: Alan Cox <hidden>
Date: 2005-08-25 10:29:49
Also in:
lkml
You need the kernel side timeout. Consider this case One page of memory holds the parking code A second page is swapped to disk and holds the resume code You park the disk You wakeup You got to page in the resume code So you really do want the kernel helping to avoid a deadlock
@@ -1661,6 +1671,9 @@ where = ELEVATOR_INSERT_FRONT; rq->flags |= REQ_PREEMPT; } + if (action == ide_next) + where = ELEVATOR_INSERT_FRONT; + __elv_add_request(drive->queue, rq, where, 0); ide_do_request(hwgroup, IDE_NO_IRQ); spin_unlock_irqrestore(&ide_lock, flags);
Also puzzles me- why is this needed ?