[openib-general] IB stack configured for kernel only support?

[Smith, Stan]

Will the openIB 2.6.x stack support a 'kernel only' configuration
suitable to be run from a ramdisk (initrd) boot environment?
Specifically, IB startup has no dependencies on 'root' filesystem
inodes.

Will user-mode IB be supported in such a manner that it can be
enabled/loaded 'after'  the kernel IB stack has been started?

Case in point, an openSSI (www.openSSI.org) kernel creates an ICS
(Internode Communication Subsystem) channel during the ramdisk (initrd)
phase of kernel boot. This ICS channel is expected to persist thru the
mounting of the root filesystem until kernel shutdown. For Infiniband
ICS support, the kernel IB stack is started with connections established
during the ramdisk (initrd) phase of system booting. If the user-mode IB
stack requires a 'root' inode (/dev?) for ioctl access to kernel IB
layers, then the user-mode startup must be delayed until the 'root'
filesystem is actually mounted.



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