[openib-general] user CM uses devfs

Libor Michalek libor at topspin.com
Tue May 31 15:29:41 PDT 2005


On Tue, May 31, 2005 at 05:54:38PM -0400, William Jordan wrote:
> Why does the userlevel CM use devfs to create device nodes? Userlevel
> verbs and mad layers appear to rely on udev.

  No reason except that I went with what I thought was the simpler
model at the time. Unlike the verbs and mad layers which need a certain
number of device nodes for every physical device installed including
hot-plug support, the userlevel CM needs just one device node for
communicating with the kernel CM which should be present the entire
time the kernel CM is loaded. 


-Libor



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