Re: [PATCH] Microblaze: implement dma-coherent API andrefactorcacheflush code.

[Michal Simek]

Hi John, Steve and others,

I'll only rename flush to invalidate. Thant's all for now.

Michal

> On Mon, 5 May 2008, Stephen Neuendorffer wrote:
>>> -----Original Message-----
>>> From: John Williams [mailto:john.williams@xxxxxxxxxxxxx]
>>>
>>> Sure - what I meant is can dma_alloc just call kmalloc to do it's
>> work?
>>
>> I scanned through Linux Device Drivers, and it appears that calling
>> get_free_pages is:
>> 1) more efficient than kmalloc for large allocations
>> 2) allocates physically contiguous memory, which kmalloc doesn't
>> necessarily do if there's an mmu.
> 
> kmalloc() allocates physically contiguous memory, vmalloc() doesn't.
> 
> Gr{oetje,eeting}s,
> 
> 						Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
> 							    -- Linus Torvalds
> 
> 

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