Subject: DMA caused double fault
To: None <>
From: Filka Michal <>
List: tech-kern
Date: 04/28/2006 14:09:59
Hi all,
I've suddenly started getting "double fault trap" during DMA
It started to occure after one not so clean reboot of NetBSD. The driver
was working (including DMA) well until that reboot happened.=20
Can be OS corrupted?

There is a part of backtrace:

netbsd: pmap_extract + 0x21
call netbsd:pmap_map_ptes


Architecture: x86

Is there anyone, who can recognize if it happens due to corruption of
I invite any advice with debugging of this situation ...

Thanks all
Michal Filka