Control: severity -1 important Control: tag -1 upstream On Mon, 2015-08-10 at 13:52 +0900, Christian Balzer wrote: [...] > I'm also not seeing this on several other machines we use for Ceph with the > current Jessie kernel, but to be fair they use slightly different (QDR, > not FDR) ConnectX-3 HBAs.
If SR-IOV is enabled on the adapter then the ports will always operate in Ethernet mode as it's apparently not supported for IB. Perhaps SR -IOV enabled on some adapters but not others? If that's not the issue, it looks like you are supposed to set a module parameter in mlx4_core: port_type_array:Array of port types: HW_DEFAULT (0) is default 1 for IB, 2 for Ethernet (array of int) e.g.: options mlx4_core port_type_array=1,1 I don't know what determines the hardware default. [...] > Given that the previous version works as expected and that Jessie is > doing the "right" thing as well, I'd consider this a critical bug. No, it is important (since it is a regression) but it is not critical. > Had I rebooted the older production cluster with 500,000 users on it into > this kernel, the results would not have been pretty. And that's why you tested on one machine first, right? Ben. -- Ben Hutchings I say we take off; nuke the site from orbit. It's the only way to be sure.
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