Device DMA Buffer vs RX Queue

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Device DMA Buffer vs RX Queue

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09-29-2015, 06:44 AM	#1
ankit_singh LQ Newbie Registered: Mar 2013 Posts: 20 Rep:	Device DMA Buffer vs RX Queue Hi, I have been reading different books on Network Stack (for example - TCP_IP Architecture, Design and Implementation in Linux)and got one very basic doubt. Doubt:- The terms "Device DMA Buffer" and "RX Queue" refer to same buffer ? Any Network packet before reaching RX Queue, is stored to any other location also on the device ? If RX Queue is full then at what layer the packets are dropped ? I mean do the packets are first stored locally somewhere before checking RX Queue full? Regards, AS

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