Messages in this thread | | | Date | Thu, 10 Mar 2005 01:00:58 -0800 | From | Chris Wedgwood <> | Subject | Re: Can I get 200M contiguous physical memory? |
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On Thu, Mar 10, 2005 at 04:49:20PM +0800, Jason Luo wrote:
> A data acquisition card. In DMA mode, the card need 200M contiguous > memory for DMA.
ick? it can't do scatter-gather or anything sane?
> it's driver in windows can do it.
windows can get 200MB of memory on a running system relaibly? does it swap like mad when you do this?
> so custom ask us to support it. are there a way although it'is > unpopular?
you could allocate the memory at boot-time just for the driver, hacky but would work
there are a couple of patches/methods for doing this. i think a search for bigphysarea on google might help?
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