On 09.03.2014 23:53, David Miller wrote:
> To me it means "I've got nothing to do if other tasks want to run right
> now" Yes, I even see it having this meaning when an RT task executes
> it.
http://www.kernel.org/doc/htmldocs/device-drivers/API-yield.html
lists this exact "while (!event) yield;
On Sun, 9 Mar 2014, Ben Hutchings wrote:
On Sun, 2014-03-09 at 18:53 -0400, David Miller wrote:
From: Ben Hutchings
Date: Sun, 09 Mar 2014 19:09:20 +
On Thu, 2014-03-06 at 16:06 -0500, David Miller wrote:
From: Marc Kleine-Budde
Date: Wed, 5 Mar 2014 00:49:47 +0100
@@ -839,7 +839,7
On Sun, 2014-03-09 at 18:53 -0400, David Miller wrote:
> From: Ben Hutchings
> Date: Sun, 09 Mar 2014 19:09:20 +
>
> > On Thu, 2014-03-06 at 16:06 -0500, David Miller wrote:
> >> From: Marc Kleine-Budde
> >> Date: Wed, 5 Mar 2014 00:49:47 +0100
> >>
> >> > @@ -839,7 +839,7 @@ void dev_deac
From: Ben Hutchings
Date: Sun, 09 Mar 2014 19:09:20 +
> On Thu, 2014-03-06 at 16:06 -0500, David Miller wrote:
>> From: Marc Kleine-Budde
>> Date: Wed, 5 Mar 2014 00:49:47 +0100
>>
>> > @@ -839,7 +839,7 @@ void dev_deactivate_many(struct list_head *head)
>> > /* Wait for outstanding
On Thu, 2014-03-06 at 16:06 -0500, David Miller wrote:
> From: Marc Kleine-Budde
> Date: Wed, 5 Mar 2014 00:49:47 +0100
>
> > @@ -839,7 +839,7 @@ void dev_deactivate_many(struct list_head *head)
> > /* Wait for outstanding qdisc_run calls. */
> > list_for_each_entry(dev, head, unreg_
* Marc Kleine-Budde | 2014-03-06 22:39:58 [+0100]:
>> Therefore it should allow lower priority threads to run, not just
>> equal or higher priority ones.
>
>Yes, we need a call that does what you described, however I'm not sure
>if yield() really does that. According to:
>
>http://lxr.free-electro
On Thu, 2014-03-06 at 16:06 -0500, David Miller wrote:
> From: Marc Kleine-Budde
> Date: Wed, 5 Mar 2014 00:49:47 +0100
>
> > @@ -839,7 +839,7 @@ void dev_deactivate_many(struct list_head *head)
> > /* Wait for outstanding qdisc_run calls. */
> > list_for_each_entry(dev, head, unreg_lis
On 03/06/2014 10:06 PM, David Miller wrote:
> From: Marc Kleine-Budde
> Date: Wed, 5 Mar 2014 00:49:47 +0100
>
>> @@ -839,7 +839,7 @@ void dev_deactivate_many(struct list_head *head)
>> /* Wait for outstanding qdisc_run calls. */
>> list_for_each_entry(dev, head, unreg_list)
>>
From: Marc Kleine-Budde
Date: Wed, 5 Mar 2014 00:49:47 +0100
> @@ -839,7 +839,7 @@ void dev_deactivate_many(struct list_head *head)
> /* Wait for outstanding qdisc_run calls. */
> list_for_each_entry(dev, head, unreg_list)
> while (some_qdisc_is_busy(dev))
> -
On PREEMPT_RT enabled systems the interrupt handler run as threads at prio 50
(by default). If a high priority userspace process tries to shut down a busy
network interface it might spin in a yield loop waiting for the device to
become idle. With the interrupt thread having a lower priority than th
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