On Thu, Oct 26, 2017 at 12:17:18PM -0500, Chris Blake wrote: > Hello linux-rmda, > > I recently upgraded one of my boxes to 4.13, and have started > experiencing issues with ib_mthca. To start, my setup is Infiniband > direct between 2 servers using older Mellanox Technologies MT25208 > cards for ipoib as well as NFS over RDMA. After upgrading, the > following has been experienced: > > 1. On my NAS host running OpenSM, as soon as it starts I get a NULL > pointer dereference which makes infiniband unusable. [0] This only > occurs on kernel 4.13 or newer. > > 2. On my compute host not running OpenSM, connectivity works for a bit > but shortly after dmesg is full of the following message: > infiniband mthca0: ib_post_send_mad error > This occurs when my compute host is on kernel 4.13 or newer. > > I went ahead and tested some mainline kernel versions on both of my > nodes, and here are my findings: > 4.13.8 = NULL pointer dereference on NAS, IPoIB not working > 4.12.14 = Works as expected > 4.14.0-rc5 = NULL pointer dereference on NAS, IPoIB not working > > I have tried to see if I could find the patch responsible for this, > but sadly I have not had much luck. > > As for my systems, the following modules are loaded: > ib_uverbs > ib_umad > rdma_ucm > ib_mthca > ib_ipoib > > Let me know if there is anything I can test to help diagnose what is > causing this issue. Do you have CONFIG_SECURITY_INFINIBAND in your .config? Thanks > > Regards, > Chris Blake > > [0]: https://gist.github.com/riptidewave93/48595b8bc3bca669251db7d8a8e8a803 > -- > 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
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