Re: [PATCH] CPU hotplug, writeback: Don't call writeback_set_ratelimit()too often during hotplug

[Srivatsa S. Bhat]

On 09/28/2012 05:57 PM, Fengguang Wu wrote:
> On Tue, Sep 25, 2012 at 02:18:20AM +0530, Srivatsa S. Bhat wrote:
>>
>> From: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
>>
>> The CPU hotplug callback related to writeback calls writeback_set_ratelimit()
>> during every state change in the hotplug sequence. This is unnecessary
>> since num_online_cpus() changes only once during the entire hotplug operation.
>>
>> So invoke the function only once per hotplug, thereby avoiding the
>> unnecessary repetition of those costly calculations.
>>
>> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
>> ---
> 
> Looks good to me. I'll include it in the writeback tree.
> 

Great, thanks!
 
Regards,
Srivatsa S. Bhat

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