Messages in this thread | | | Date | Thu, 25 May 2006 11:07:44 +0200 | From | Brice Goglin <> | Subject | Re: [PATCH 3/4] myri10ge - Driver core |
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Benjamin Herrenschmidt wrote: > On Wed, 2006-05-24 at 10:04 +0200, Brice Goglin wrote: > > >> I am not sure what you mean. >> The only ppc64 with PCI-E that we have seen so far (a G5) couldn't do >> write combining according to Apple. >> > > That is not 100% true.... I don't know what apple had in mind. It also > depends in what slot you are. > > Do you have ways to measure the difference ? >
No, we don't have any PPC with PCIe running Linux. The only G5 PCIe that we have is running MacOSX.
> Try doing __ioremap(mgp->iomem_base, mgp->board_span, _PAGE_NO_CACHE); > instead of using the normal ioremap for #ifdef powerpc and tell us if it > makes a difference. >
I'll try it as soon as we get our G5 PCIe to run Linux.
thanks, Brice
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