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xen-devel
RE: [Xen-devel] [PATCH6/6] cpuidle: redefine cpumask_lock as rwlock_t
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To: |
Jan Beulich <JBeulich@xxxxxxxxxx> |
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Subject: |
RE: [Xen-devel] [PATCH6/6] cpuidle: redefine cpumask_lock as rwlock_t |
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From: |
"Wei, Gang" <gang.wei@xxxxxxxxx> |
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Date: |
Thu, 17 Jun 2010 16:54:15 +0800 |
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"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, "Wei, Gang" <gang.wei@xxxxxxxxx> |
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Thu, 17 Jun 2010 01:55:37 -0700 |
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[Xen-devel] [PATCH6/6] cpuidle: redefine cpumask_lock as rwlock_t |
On Thursday, 2010-6-17 4:30 PM, Jan Beulich wrote:
>>>> On 17.06.10 at 09:38, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
>> cpuidle: redefine cpumask_lock as rwlock_t
>>
>> Multiple cpus clear hpet channel cpumask simultaneously is ok. So we
>> can change the cpumask_lock to rwlock_t.
>
> Now this I think really needs a comment in the code: You use a read
> lock on the writer side and a write lock on the reader side - quite
> the opposite of normal behavior.
Good suggestion, I will add it.
Jimmy
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