linux-kernel - Re: [PATCH] Avoid mask based num_possible_cpus and num_online

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Message-ID: <4F187FA1.9090006@jp.fujitsu.com>
Date:	Thu, 19 Jan 2012 15:40:01 -0500
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	venki@...gle.com
CC:	kosaki.motohiro@...il.com, akpm@...ux-foundation.org,
	travis@....com, srivatsa.bhat@...ux.vnet.ibm.com,
	paul.mckenney@...aro.org, rjw@...k.pl,
	paul.gortmaker@...driver.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Avoid mask based num_possible_cpus and num_online_cpus

On 1/19/2012 3:01 PM, Venkatesh Pallipadi wrote:
> Does this look better? Will send separate patch to fix code
> using num_possible_cpus() when they actually need nr_cpu_ids.

Sound ok to me. but I have two requests.

 - Please mesure how much time (or cycle) spented by cpumask_weight(cpu_possible_mask).
 - After your patch, nr_possible_cpus() return different value from before.
   Please verify this change doesn't makes any side effect.


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