[ofa-general] Write combining support in OFED 1.5

[Jack Morgenstein]

Adding Eli Cohen (author of the huge-page support patch).

Eli, what is missing on the PPC regarding huge page support?

-Jack

On Tuesday 07 July 2009 13:54, Or Gerlitz wrote:
> Jack Morgenstein wrote:
> > Yes, see kernel_patches/fixes/mlx4_0010_add_wc.patch. With OFED 1.5, I am trying to use the kernel-based WC support, and eliminate the patch. To do this, I need 2 things:
> > 1. macro pgprot_writecombine to be defined for PPC/PPC64 under the arch directory (file arch/powerpc/include/asm/pgtable.h)
> > 2. A way of determining (via the standard kernel) if write-combining is available on a given platform (to allow disabling use of ConnectX blueflame in userspace if WC is not available).
> >   
> It seems that none of the issues are IB specific, correct? As for PPC 
> guys I think we have another open issue with them, regarding huge pages 
> support, a patch which isn't mainline. Maybe you can use the opportunity 
> to set 
> http://lists.openfabrics.org/pipermail/general/2009-January/056812.html 
> as well...
> 
> Or.
> 
> 
>