What's the best filesystem battery-wise for laptops?

[Net Llama!]

Bob Raymond wrote:
> Net Llama! wrote:
>> Bob Raymond wrote:
>>> He's coming over Sunday so I can install SuSE 8.0 (to replace 7.3) and I
>>> noticed XFS is one of the options.  I know from personal experience that
>>> it is faster than ReiserFS, but how good is it on the batteries, or is
>>> the filesystem even the problem?
>>
>> The filesystem has little to no effect.  I'd wager good money that 
>> windozeXP is not spinning up his HD to 5400rpm, and is halving his CPU 
>> clock speed in order to save power.  apm can definitely help with this 
>> stuff in Linux (as could the BIOS, possibly), however the question 
>> comes down to whether he wants performance or battery life.
>>
>> Something else to consider is his kernel, which i really doubt was 
>> optimized for a mobile system, or his CPU. 
> 
> Actually, I downloaded the 2.4.18 sources when they came out and 
> optimized it for P-4.  This is not a mobile P-4 processor, either.  He 
> bought the system about a month and a half before the P4-M's came out. I 
> made sure to choose only his hardware in the kernel.  For some reason, 
> whenever the APM does its trick with the screen, X gets frozen as well.  
> Could that be the current low level of support for the Radeon 7500?  
> This is the first X release to support it, and the GPU is slightly 
> different from the standard Radeon that has kernel support.

That's quite possible.  Its also possible that apm and/or the kernel 
isn't properly configured for power management.

> I don't think WindeXP is about to halve the clock speed or anything of 
> the sort on a desktop P-4, as that is only done in the BIOS.  But it may 
> be screwing with the HD.

I've read that windoze does play tricks with the CPU, so this is 
definitely a possibility.


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                       	       netllama at linux-sxs.org
Linux Step-by-step & TyGeMo: 		    http://netllama.ipfox.com

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