Cxm and dma...

[usleepless at gmail.com]

Anders,

On 2/28/07, Anders Troback <freebsd at troback.com> wrote:
> Hi,
>
> I'm running MythTV with a PVR-350 card (using pvrxxx). In "Live View"
> the performance is bad. In /var/log/messages I've got lots of:
> ......
> Feb 28 22:15:07 tv kernel: cxm0: encoder dma not already in progress
> Feb 28 22:15:07 tv kernel: cxm0: encoder dma not enough buffer space
> .....
>
> My system is a 2.4 GHz Pentium with 515Mb RAM running on a FreeBSD 6.2.
>
> Any ideas out there?

you can crank up CXM_SG_BUFFERS in cxm.h. try that.

it is this low ( 16 ) at the moment because i had strange panics on
4.11 with 4 cards ( each claiming #CXM_SG_BUFFERs ). settings this to
16 solved the issue.

regards,

usleep