Re: [PATCH] Make GFP_DMA allocations w/o ZONE_DMA emit a warning instead of failing

[Russell King - ARM Linux <linux@arm.linux.org.uk>]

On Fri, Jun 10, 2011 at 11:54:16AM -0700, David Rientjes wrote:
> On Fri, 10 Jun 2011, Russell King - ARM Linux wrote:
> 
> > > Should one submit a patch adding a warning to GFP_DMA allocations
> > > w/o ZONE_DMA, or the idea of the original patch is wrong?
> > 
> > Linus was far from impressed by the original commit, saying:
> > | Using GFP_DMA is reasonable in a driver - on platforms where that
> > | matters, it should allocate from the DMA zone, on platforms where it
> > | doesn't matter it should be a no-op.
> > 
> > So no, not even a warning.
> > 
> 
> Any words of wisdom for users with CONFIG_ZONE_DMA=n that actually use 
> drivers where they need GFP_DMA?  The page allocator should just silently 
> return memory from anywhere?

See Linus' reply.  I quote again "on platforms where it doesn't matter it
should be a no-op".  If _you_ have a problem with that _you_ need to
discuss it with _Linus_, not me.  I'm not going to be a middle-man sitting
between two people with different opinions.

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