On 01/03/2017 07:00 PM, Waiman Long wrote:
> For nested spinlock with outer lock acquired, it will
> + * boost its priority to the highest RT priority level to try to acquire the
> + * inner lock, finish up its work, release the locks and reenable preemption.
DL scheduler turns the definition of
On 01/04/2017 05:07 AM, Boqun Feng wrote:
> On Tue, Jan 03, 2017 at 01:00:29PM -0500, Waiman Long wrote:
>> Ideally we want the CPU to be preemptible even when inside or waiting
>> for a lock. We cannot make it preemptible when inside a lock critical
>> section, but we can try to make the task volu
On Tue, Jan 03, 2017 at 01:00:29PM -0500, Waiman Long wrote:
> Ideally we want the CPU to be preemptible even when inside or waiting
> for a lock. We cannot make it preemptible when inside a lock critical
> section, but we can try to make the task voluntarily yield the CPU
> when waiting for a lock
Ideally we want the CPU to be preemptible even when inside or waiting
for a lock. We cannot make it preemptible when inside a lock critical
section, but we can try to make the task voluntarily yield the CPU
when waiting for a lock.
This patch checks the need_sched() flag and yields the CPU when th
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