[openib-general] ib_post_recv buffer re-use

[Grant Grundler]

On Mon, Jun 20, 2005 at 01:06:24PM -0700, Andrei Petrov wrote:
> Application I'm working on needs to receive and process messages
> from RQ, so I dma_map and ib_post_recv pool of buffers. 
> Then after I receive a message I plan to reuse already mapped
> buffer for consequent ib_post_recv. Is that safe? Should I worry
> about dma syncronisation?

Can you define "application" more clearly?
Is this an in-kernel "application" or user space application?

Can you be more specific about the life cycles of the buffers?
Which interfaces allocates them and which code "consumes" them?

I suggest reading Documentation/DMA-API.txt in a 2.6.11 or 2.6.12
source tree to get an idea of how DMA is managed by linux kernel.

grant