Messages in this thread |  | | Date | Thu, 05 Jul 2001 18:07:57 +0530 | From | Vasu Varma P V <> | Subject | Re: DMA memory limitation? |
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but we have a macro in include/asm-i386/dma.h, MAX_DMA_ADDRESS (PAGE_OFFSET+0x1000000).
if i change it to a higher value, i am able to get more dma memory. Is there any way i can change this without compiling the kernel?
Arjan van de Ven wrote:
> Vasu Varma P V wrote: > > > > Hi, > > > > Is there any limitation on DMA memory we can allocate using > > kmalloc(size, GFP_DMA)? I am not able to acquire more than > > 14MB of the mem using this on my PCI SMP box with 256MB ram. > > I think there is restriction on ISA boards of 16MB. > > Can we increase it ? > > Why? > YOu don't have to allocate GFP_DMA memory for PCI cards! > GFP_DMA is for ISA cards only
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