linux-kernel - Re: mmap error?

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Date:	Mon, 02 Apr 2007 15:35:17 -0400
From:	Gene Heskett <gene.heskett@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Kyle Moffett <mrmacman_g4@....com>
Subject: Re: mmap error?

On Monday 02 April 2007, Kyle Moffett wrote:
>On Apr 02, 2007, at 13:54:28, Gene Heskett wrote:
>> Ahh, thank you very much.  But I have 7.0, supposedly fixed,
>> sigh...  That did fix it, the dvd is burning as I type, again thanks.
>>
>> ???? Can I put this into rc.local so its global?  I guess I will
>> just for effects.  Or is there an option in a make xconfig to reset
>> this to a usable sized limit?, because I can see cups also having
>> problems since I have its render cache set for 127 megs, which
>> should also trigger this.
>
>Well, that's not a limit on how much memory you can map, it's a limit
>on how many pages you can lock into memory (as in, cannot be swapped
>out or written back to disk and reused).  For low-latency
>applications (IE: cd burning) you need to have all memory mlocked so
>that you don't get a low-latency wakup and then promptly lose all
>latency guarantees by swapping madly, but something like CUPS doesn't
>have a problem because it doesn't use mlock() or mlockall().
>
Ah, that clarifies that then, thanks Kyle.

>Cheers,
>Kyle Moffett



-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The perversity of nature is nowhere better demonstrated by the fact that, 
when
exposed to the same atmosphere, bread becomes hard while crackers become 
soft.
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