On Thu, Feb 3, 2011 at 8:40 AM, Mike Mundy <[email protected]> wrote:
> I'm prototyping a server that needs to accept a large number of
> simultaneous incoming RDMA CM connections. I noticed that
> drivers/infiniband/core/ucma.c limits the backlog to 128. Is there a
> reason why the limit is 128? Or to put it another way, what breaks if
> the limit is increased to a larger value (say 256)?

In the current kernel the backlog defaults to 1024 and there is a sysctl to
change it at runtime.

So I think you are completely safe increasing your backlog on older
kernels.  (The commit to backport is 97cb7e40c696)

 - R.
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