linux-kernel - Re: [RFC patch 0/4] change 64 bit variables to long type

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Date:	Mon, 17 Jun 2013 09:01:55 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Alex Shi <alex.shi@...el.com>, mingo@...hat.com,
	peterz@...radead.org, pjt@...gle.com
CC:	tglx@...utronix.de, akpm@...ux-foundation.org, bp@...en8.de,
	namhyung@...nel.org, efault@....de, morten.rasmussen@....com,
	vincent.guittot@...aro.org, preeti@...ux.vnet.ibm.com,
	viresh.kumar@...aro.org, linux-kernel@...r.kernel.org,
	mgorman@...e.de, riel@...hat.com, wangyun@...ux.vnet.ibm.com,
	Jason Low <jason.low2@...com>
Subject: Re: [RFC patch 0/4] change 64 bit variables to long type

On 06/14/2013 10:20 PM, Alex Shi wrote:
> On 06/07/2013 03:29 PM, Alex Shi wrote:
>> There are some 64 bits variables in cfs_rq/tg etc. That ask expensive
>> operations in 32 bit machine. But in fact, long type is enough for them.
>>
>> So do this change lead more efficient code and without data lose.
>>
> 
> some variable like cfs_rq->runnable_load_avg, there is no much changes
> in patch 1/4, since in most of place it was treated as a 'unsigned
> long', not u64.
> 

The patchset change some u64 load avg variables to 'unsigned long' type,
because the related load variable is 'unsigned long' too.

Peter,
It looks quite straight. So if Paul is too busy to look into this,
Believe you can do decide independent.  :)

>> Regards
>> Alex
>>
> 
> 


-- 
Thanks
    Alex
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