Re: experiences beyond 4 GB RAM with 2.4.22

[Jens Axboe]

On Wed, Sep 17 2003, Alan Cox wrote:
> On Maw, 2003-09-16 at 20:58, Olivier Galibert wrote:
> > On Tue, Sep 16, 2003 at 04:29:02PM +0100, Alan Cox wrote:
> > > The kernel has no idea what you will do with given ram. It does try to
> > > make some guesses but you are basically trying to paper over hardware
> > > limits.
> > 
> > Is there a way to specifically turn that ram into a tmpfs though?
> 
> 
> Something like z2ram copied and hacked a little to kmap the blocks it
> wants would give you a block device you could use for swap or for /tmp.
> Im not sure tmpfs would work here

Aditionally, you need GFP_DMA32 or similar. Would also alleviate the
nasty pressure on ZONE_NORMAL which is often quite stressed.

-- 
Jens Axboe

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