Re: [patch] tune vmalloc size

[Martin J. Bligh]

--Andi Kleen <ak@xxxxxx> wrote (on Wednesday, September 15, 2004 15:29:53 +0200):

> Ingo Molnar <mingo@xxxxxxx> writes:
> 
>> there are a few devices that use lots of ioremap space. vmalloc space is
>> a showstopper problem for them.
>> 
>> this patch adds the vmalloc=<size> boot parameter to override
>> __VMALLOC_RESERVE. The default is 128mb right now - e.g. vmalloc=256m
>> doubles the size.
> 
> Ah, Karsten Keil did a similar patch some months ago. There is 
> clearly a need.
> 
> But I think this should be self tuning instead. For a machine with 
> less than 900MB of memory the vmalloc area can be automagically increased,
> growing into otherwise unused address space. 
> 
> This way many users wouldn't need to specify weird options.  So far
> most machines still don't have more than 512MB.

It already does that, IIRC.

M.

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