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Forum Topic - Does io-pkt retry writes?:

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Max Timchenko

01/04/2011 6:57 AM

post81011

Looking at the "Porting an io-net driver to io-pkt" document's description of Write process, what happens when a network
 driver doesn't have any empty buffers and doesn't call IFQ-DEQUEUE()?

Will the io-pkt framework retry the write (and when), or will it drop the packet?

Thanks, Max

Andrew Boyd(deleted)

01/05/2011 8:26 AM

post81163

Re: Does io-pkt retry writes?

> what happens when a network driver doesn't have any empty 
> buffers and doesn't call IFQ-DEQUEUE()?

That's how most of the io-pkt drivers are coded.  The packet is
left queued with the stack by the driver and the next time the 
stack calls the driver if_start function, hopefully some resources 
are available.

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