RE: DMA memory limitation?

> On Thu, 5 Jul 2001, 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

[Q] mmap/munmap of physical address

ld have the same virt addr pointing to 2 different physical areas]. I am wondering if there is something totally obvious I am missing there in the process (i.e., is there unmap_page_range taking the virtual address as input... ;) ) Thanks in advance... Christophe Beaumont Sr Software E

[Q] mmap/munmap of physical address

virt addr pointing to 2 different physical areas]. I am wondering if there is something totally obvious I am missing there in the process (i.e., is there unmap_page_range taking the virtual address as input... ;) ) Thanks in advance... Christophe Beaumont Sr Software Engineer

HUGE contiguous mem space with 2.4

Hi... I am facing an odd problem here. I have an application here that requires a HUGE physically contiguous memory area to be locked (yes, I have hardware DMA'ing in and out of that area, over the PCI bus). HUGE being like one Gig (could be more if needed...) I am trying to use the mem=1024M

HUGE contiguous mem space with 2.4

Hi... I am facing an odd problem here. I have an application here that requires a HUGE physically contiguous memory area to be locked (yes, I have hardware DMA'ing in and out of that area, over the PCI bus). HUGE being like one Gig (could be more if needed...) I am trying to use the mem=1024M