Vladislav Bolkhovitin wrote:
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.
Here is the simple rule of thumb:
1. If you want to use latest/greatest top of trunk SCST SVN, kernel
2.6.28, 29... then you have to use the IB driver/modules in that kernel
tree. You also have to use the ib_srpt driver in SCST SVN tree
2. If you want to run IB driver, ib_srpt driver and SCST on distribution
default kernel (RHEL 5,0/1/2 and its family ie. fedora, centos..., sles
10 sp1/sp2...) then you should use OFED package (with ib_srpt inside the
package), SCST-1.0.0
In the OFED-1.xxx/docs directory, there is a readme on how-to ib_srpt
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