Re: [PATCH v2] sched: update_top_cache_domain only at the times ofbuilding sched domain.

[Michael Wang]

On 07/24/2013 06:49 PM, Peter Zijlstra wrote:
> On Wed, Jul 24, 2013 at 04:34:39PM +0800, Michael Wang wrote:
>> But your patch will run the risk to get a freed sd, since you make
>> 'sd_llc' wrong for a period of time (between destroy and rebuild) IMO.
>>
>> I guess I get you point, you are trying to save one time update since
>> you think this will be done twice, but actually the result of this two
>> time update was different, it's not redo and it's in order to sync
>> 'sd_llc' with 'rq->sd'.
> 
> Michael is right, you cannot skip update_top_cache_domain() when
> destroying things.

Thanks for the confirm :)

Regards,
Michael Wang

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