On Tuesday 07 July 2009 13:03, Or Gerlitz wrote: > Jack Morgenstein wrote: > > I've been looking at the write-combining support in the 2.6.30 kernel, and > > it looks good [...] from the write-combining support in OFED 1.4: > > > Hi Jack, is there some WC related code which is in ofed but not in > mainline? why? > > Or.
Yes, there is (see kernel_patches/fixes/mlx4_0010_add_wc.patch). OFED 1.4 is based on kernel 2.6.27, which did not have kernel-based WC support -- this support was put in the kernel only in kernel 2.6.29. 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). -Jack _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
