Hi Jianfeng, On 10/11/2017 12:33 PM, Jianfeng Tan wrote:
If we want to enable IOVA mode, introduced by commit 93878cf0255e ("eal: introduce helper API for IOVA mode"), we need PMDs (for PCI devices) to expose this flag.Signed-off-by: Jianfeng Tan<[email protected]> --- drivers/net/e1000/em_ethdev.c | 3 ++- drivers/net/e1000/igb_ethdev.c | 5 +++-- drivers/net/fm10k/fm10k_ethdev.c | 3 ++- drivers/net/i40e/i40e_ethdev.c | 3 ++- drivers/net/i40e/i40e_ethdev_vf.c | 2 +- drivers/net/ixgbe/ixgbe_ethdev.c | 5 +++-- 6 files changed, 13 insertions(+), 8 deletions(-)
This patch introduces a regression when doing device assignment in guest, because current VT-d emulation only supports 39bits guest address width [0]. In the Bz, Peter suggest we could have an IOVA allocator algorithm, which could start to allocate IOVAs from 0. I think it could solve the --no-huge case your series address, do you agree? But it would be a long term solution, we need to fix this in stable. Is the --no-huge option used in production, or is it only for testing? If the latter do you think we could revert your patch while we find a solution that makes all cases to work? Ferruh, I see you also faced problems with KNI, how did you solved it? Thanks, Maxime [0]: https://bugzilla.redhat.com/show_bug.cgi?id=1530957#c3
