Re: swiotlb_alloc_coherent: allocated memory is out of range fordevice
From: Ingo Molnar
Date: Thu Oct 23 2008 - 06:16:55 EST
* Takashi Iwai <tiwai@xxxxxxx> wrote:
> At Thu, 23 Oct 2008 07:22:09 +0200,
> I wrote:
> > > The current dma_alloc_coherent (asm-x86/dma-mapping.h) handles the gfp
> > > flags in the exact same way as the old dma_alloc_coherent
> > > (pci-dma.c). Neither sets GFP_DMA even if coherent_dma_mask is
> > > 24bits. The old code is fine because of the GFP_DMA retry
> > > mechanism. But if coherent_dma_mask is 24bits, there is no point to go
> > > into the GFP_DMA retry mechanism. We should use GFP_DMA in the first
> > > place.
> > >
> > > How about the following patch?
> > I'll give it a try later (the machine is in my office).
> The patch seems working fine. Thanks!
> Tested-by: Takashi Iwai <tiwai@xxxxxxx>
thanks guys - i've queued it up in tip/core/urgent and will send a pull
request to Linus later today.
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