DMA failure to pages w/ addr under 64meg

From: volodya@mindspring.com
Date: Sat Dec 08 2001 - 21:33:57 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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This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:14 EST