Hi, Here is a patch that implements 64bit DMA on msk(4). If you use msk(4) on a system that has more than 4GB memory, please try the patch at the following URL and let me know whether it works or not. You need latest msk(4) in HEAD to apply the patch. http://people.freebsd.org/~yongari/msk/msk.64bit.dma.diff
Previously msk(4) may have used bounce buffers on systems that have more than 4GB memory. You can verify whether msk(4) is using bounce buffers by checking the output of "sysctl hw.busdma". For instance, hw.busdma.zone0.total_bounced counter would increase while network operation is in progress. If patch above works you wouldn't see the counter change anymore and it would also enhance network performance since it wouldn't have to copy from or to bounce buffers. Thanks. _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
