DMA failure to pages w/ addr under 64meg

volodya@mindspring.com
Sat, 8 Dec 2001 21:33:57 -0500 (EST)

What could cause a DMA transfer to a page with physical address below
64mb to fail ?

Context: I am using rvmalloc code from bt848 driver in video capture
module (km, http://www.sf.net/projects/gatos). The device that does the
transfer is AGP videocard (Radeon), transfer from device to main memory.

All transfers to pages with physical addresses below fail consistently.

thanks !

Vladimir Dergachev

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