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

Michal Simek
2008-05-06T09:32:30Z

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@petalogix.com]
>>>
>>> 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@linux-m68k.org
>
> 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
>
>