linux-kernel - Re: [RFC][PATCH] Dynamic Tick: Allow 32-bit machines to sleep for more than 2.15 seconds

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Message-ID: <49EF37FC.8020909@nortel.com>
Date:	Wed, 22 Apr 2009 09:30:04 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Jon Hunter <jon-hunter@...com>
CC:	john stultz <johnstul@...ibm.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH] Dynamic Tick: Allow 32-bit machines to sleep for
 more than 2.15 seconds

Jon Hunter wrote:

> So this 
> assumes that long long will be a 64-bit type which I don't like. 
> However, this would not cause any compilation issues even if long long 
> turned out to be 32-bits or 128-bits (if this is even possible).

Isn't "long long" guaranteed to be 64-bit on all linux systems?

Unless the width is critical, I'd prefer to stay away from u64 until it 
gets unified between architectures.  I recently ran into a problem 
printk-ing a "u64" value because it was a different type on ppc64 than 
x86-64.


Chris
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