On Thu, Aug 25 2005, Jon Escombe wrote:
> Alan Cox wrote:
> >@@ -1661,6 +1671,9 @@
> >where = ELEVATOR_INSERT_FRONT;
> >rq->flags |= REQ_PREEMPT;
> >}
> >+ if (action == ide_next)
> >+ where = ELEVATOR_INSERT_FRONT;
> >+
> >__elv_a
Alan Cox wrote:
@@ -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(h
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
Jens Axboe wrote:
Ok, I'll give you some hints to get you started... What you really want
to do, is:
- Insert a park request at the front of the queue
- On completion callback on that request, freeze the block queue and
schedule it for unfreeze after a given time
Am attaching a first att
> On Fri, Aug 19 2005, Jon Escombe wrote:
> > For hard disk protection, I prefer the idea of the userspace code
> > thawing the drive based on current accelerometer data, rather than
> > simply waking up after x seconds (maybe you're running for
> a bus rather
> > than falling off a table)...
> >
Dave Hansen wrote:
> In reality, that probably means a statically compiled daemon that
> mlock()s itself, and any structures that it will need. It _might_ even
> need to keep an open file descriptor on the "frozen" file. Because, in
> theory, that file could be written out to the sysfs backing s
On Fri, Aug 19 2005, Jon Escombe wrote:
>
> Please make it "echo 1 > frozen", then userspace can do "echo 0 >
> frozen"
> after five seconds.
>
>
> >>>What if the code to do "echo 0 > frozen" is swapped out to disk? ;)
> >>>
> >>>
> >>Emergency head parker needs
Please make it "echo 1 > frozen", then userspace can do "echo 0 > frozen"
after five seconds.
What if the code to do "echo 0 > frozen" is swapped out to disk? ;)
Emergency head parker needs to be pagelocked for other reasons. You do
not want to page it from disk while your note
On Thu, 2005-08-18 at 17:15 -0400, Adam Goode wrote:
> On Thu, 2005-08-18 at 22:49 +0200, Pavel Machek wrote:
> > Please make it "echo 1 > frozen", then userspace can do "echo 0 > frozen"
> > after five seconds.
>
> What if the code to do "echo 0 > frozen" is swapped out to disk? ;)
In the real wo
On Tue, Aug 16 2005, Alejandro Bonilla Beeche wrote:
If I were in your position, I would just implement this for ide (pata,
not sata) right now, since that is what you need to support (or do some
of these notebooks come with sata?). So it follows that you add an ide
Some notebooks are co
On 8/16/05, Alejandro Bonilla Beeche <[EMAIL PROTECTED]> wrote:
> On Tue, 2005-08-16 at 22:07 +0200, Jens Axboe wrote:
> > On Tue, Aug 16 2005, Alejandro Bonilla Beeche wrote:
> > If I were in your position, I would just implement this for ide (pata,
> > not sata) right now, since that is what you
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