[mythtv-users] Ceton Linux driver 1.6 supports more than 3GiB of RAM
gary.buhrmaster at gmail.com
Fri Feb 10 20:05:15 UTC 2012
On Fri, Feb 10, 2012 at 18:54, John Drescher <drescherjm at gmail.com> wrote:
> Hmm. Does this mean the drivers are 32 bit only? Its been probably 5
> years since I have had a 32 bit linux machine. Even at work.
I could have sworn I saw a reference that indicated that the
issue was the DMA engine on card had a 32bit (addressing)
restriction. What that requires (in a 64bit driver) is to make
sure that one acquires memory "below the line" for DMA
(and there are ways to do it, called "bounce buffers"). I
could have imagined that reference (because I have recently
been dealing with another card with the exact same issue).
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