What information is displayed by the command cat/proc/dma?
A.
whether DMA is enabled
B.
which DMA channels are in use
C.
which DMA mode is in use
D.
general information about DMA on the machine
Explanation:
/proc/dma
This file contains a list of the registered ISA direct memory access (DMA) channels in use. A
sample/proc/dma files looks like the following:
4: cascade
It shows whether DMA is enabled or not.
I Think the correct answer is B.
The file /proc/dma is used to learn what DMA adresses does the system use.
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the correct answer is B
$ cat /proc/dma ( what dma channels are used )
Refrence
http://www.brunolinux.com/02-The_Terminal/Hardware_info_commands.html
/proc/dma – Shows which DMA channels are being used at the moment.
http://www.thegeekstuff.com/2010/11/linux-proc-file-system
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