Chris Worley, on 04/27/2009 07:54 PM wrote:
On Mon, Apr 27, 2009 at 5:03 AM, Bart Van Assche
<[email protected]> wrote:
On Mon, Apr 27, 2009 at 8:27 AM, Jack Morgenstein
<[email protected]> wrote:
The OFED distributions may contain features that the mainstream kernels and
libraries do not support.
These features frequently require changes in the Infiniband kernel modules.
Such changes are in the form
of kernel patches which are applied to the base mainstream kernel on which the
OFED release is based.
A lag between the mainstream kernel and the OFED kernel is unavoidable, since
the new features are first
released in the OFED distributions -- and later, gradually (and hopefully),
these features make there way
into the upstream kernel.
I don't doubt that there is a good reason why new features go in the
OFED distribution first and later in the mainstream Linux kernel.
My opinion is: IB is still just too bleeding edge, even for the
vanilla Linux kernel.
Maybe "Upstream First" is the measure of IB achieving stability.
SRP (specifically the SCST target code) is my first case in using IB
where I've not been able to start with the latest OFED (or IBGD)
stable release, as OFED is unsupported by the SRP target code, and had
to start with a distro's IB version to get a working SRP target (of
which Ubuntu 8.10 provided the only stable SRP target distro for my
configuration).
I think, to find out who's guilty, OFED or SRP target driver, you should
simply try the latest SCST/SRP driver from the SCST SVN trunk with the
known working OFED. Only make sure you don't have again mixed up older
and new SCST headers.
Vlad
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