acd0 vs cd0 (ATAPICAM)
Bryan Liesner
bleez at comcast.net
Wed Sep 24 16:20:57 PDT 2003
On Wed, 24 Sep 2003, Thomas Quinot wrote:
> Le 2003-09-19, Guillaume écrivait :
>
> > Thanks for the patch. cd0 is faster now and ATAPICAM works great.
> > Are you going to commit the patch?
>
> DMA is now enabled for ATAPI/CAM i/o, as of atapi-cam.c rev. 1.26.
> Thanks to all who tested and reviewed the change.
>
No, thank you! dd'ing a full data CD before this fix had top showing
at least 50% of the CPU time in interrupt - it's now down to the usual
5% or less.
-Bryan
More information about the freebsd-current
mailing list