Messages in this thread | | | Date | Thu, 11 Jan 2001 17:09:03 -0200 | From | Arnaldo Carvalho de Melo <> | Subject | Re: Linux driver: __get_free_pages() |
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Em Thu, Jan 11, 2001 at 12:39:33PM -0800, Paul Powell escreveu:
> Our driver is trying to allocate a DMA buffer to flash an adapter's > firmware. This can require as much as 512K ( of contiguous DMA memory ). > We are using the function __get_free_pages( GFP_KERNEL | GFP_DMA, order) > . The call is failing if 'order' is greater than 6. The problem is seen > on systems with system memory of only 64MB. It works fine on systems > with more memory. Does it make sense that a system with 64MB would not > have 512K ( contiguous ) available? The most that can be allocated > successfully on the 64MB system appears to be 256K. (Nothing else is > running that would eat up 64MB of memory).
> Does this make sense and/or is there another way that the DMA memory > could be allocated successfully?
look at mm/bootmem.c
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