2009/11/3 Kumar Gala <ga...@kernel.crashing.org>: > > On Nov 2, 2009, at 9:40 AM, hank peng wrote: > >> Kernel version is 2.6.30 and I have enabled fsl DMA engine during >> configuring kernel. After system booted, I have seen only 38 DMA >> interrupts, and no increase later when I am doing data transfer >> through network. >> So I wonder if mpc8548 had made use of DMA engine when doing memcpy, >> or maybe if there are other things I haven't noticed? > > The dma engine code is not normally used for normal memcpy's in the kernel. > There are explicit call sites that have async behavior that should use it > (like the networking code). > I remember normal memory copy can also be done (chosen by user) by DMA engine on IOP80331(Intel embedded cpu, xscale arch), so why ppc platform didn't make use of DMA doing memory copy, I think it can increase performance, please correct me if I am wrong!
> - k > -- The simplest is not all best but the best is surely the simplest! _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
