It looks like commit 4be90bc (IB/mad: Remove ib_get_dma_mr calls ) broke SR-IOV usage with some of our older Mellanox IB cards. After loading the mlx4_core module with some number of vfs specified (e.g. modprobe mlx4_core num_vfs=16) the following errors appear and the port's state never changes from INIT to ACTIVE: [ 1946.325804] DMAR: DRHD: handling fault status reg 302 [ 1946.331442] DMAR: DMAR:[DMA Write] Request device [16:06.1] fault addr fcb6e000 DMAR:[fault reason 02] Present bit in context entry is clear [ 1946.525788] DMAR: DRHD: handling fault status reg 402 [ 1946.531416] DMAR: DMAR:[DMA Write] Request device [16:06.1] fault addr fcb6d000 DMAR:[fault reason 02] Present bit in context entry is clear If I revert to the parent commit (96249d7) the HCA and virtual functions all initialize as expected. I'm not sure where to turn next to debug the issue further. Any tips? -- Aaron Knister NASA Center for Climate Simulation (Code 606.2) Goddard Space Flight Center (301) 286-2776 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
