> The problem is that on the sta2x11 architecture only the first > 512MB are available through the PCI bus, but the allocator can allocate > memory > for DMA above this limit. By using GFP_DMA flags the allocation take place > under the 16MB so it works.
Still, you are not running the upstream allocator. IIUC, you added a "gfp_t" field in the platform data or somewhere, so the sta2x11 can request GFP_DMA to be OR'd, while other users remain unaffected. Will you please submit the patch to achieve that? > I cannot do performance test at the moment because I don't have the time, so > I > cannot personally justify the presence of a new allocator. I don't expect you'll see serious performance differences on the PC. I think ARM users will have better benefits, due to the different cache architecture. You told me Jon measured meaningful figures on a Marvel CPU. > I will propose V4 patches soon. thanks /alessandro -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
