determining bus_dma memory usage by driver

Matthew Jacob mj at
Tue Oct 25 03:55:51 UTC 2011

On 10/24/2011 5:21 PM, Chuck Tuffli wrote:
> Is there an easy way to determine the amount of bus_dma memory
> allocated by a driver? Something similar to vmstat -m

bus_dma memory allocations are platform specific. Looking at least amd64 
you can see that the memory is carved out M_DEVBUF.

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