Re: [RFC] sched: implement the exclusive wait queue as a LIFO queue

[Changli Gao]

On Wed, Apr 28, 2010 at 3:47 PM, Xiaotian Feng <xtfeng@xxxxxxxxx> wrote:
> On Wed, Apr 28, 2010 at 1:03 PM, Changli Gao <xiaosuo@xxxxxxxxx> wrote:
>> implement the exclusive wait queue as a LIFO queue
>>
>> If the exclusive wait queue is also a LIFO queue as the normal wait queue, the
>> process who goes to sleep recently, will be woke up first. As its memory is
>> more likely in cache, we will get better performance. And when there are many
>> processes waiting on a exclusive wait queue, some of them may not be woke up,
>> if the others can handle the workload, and it will reduce the load of
>> the scheduler.
>>
>
> Starve some processes for performance?
>

Starve? Oh, No. If we don't need these processes, and we can do better
without them, why we wake them up?


-- 
Regardsï
Changli Gao(xiaosuo@xxxxxxxxx)
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