Can a buffer allocated by "vmalloc( )" be used to make DMA transmission (the buffer will be used by BIO structure) on X86_64 platform?

Hi all,
Can a buffer allocated by "vmalloc( )" be used to make DMA transmission (the
buffer will be used by BIO structure) on X86_64 platform?
I need a big buffer (cache) maybe 64MB or bigger, so I call vmalloc to
allocate the buffer.
If possible, how to get the pages in the buffer?

Thanks



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