2001-12-09 02:36:22

by Vladimir Dergachev

Subject: DMA failure to pages w/ addr under 64meg

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