Ben Greear <gree...@candelatech.com> wrote:
[ 6.405914] ixgbe 0000:05:00.1: Intel(R) 10 Gigabit Network Connection[ 6.554373] ixgbe 0000:06:00.0: Multiqueue Enabled: Rx Queue count = 8, Tx Queue count = 8 [ 6.554501] ixgbe 0000:06:00.0: PCI Express bandwidth of 32GT/s available [ 6.554504] ixgbe 0000:06:00.0: (Speed:5.0GT/s, Width: x8, Encoding Loss:20%) [ 6.554588] ixgbe 0000:06:00.0: MAC: 2, PHY: 15, SFP+: 5, PBA No: FFFFFF-0FF[ 6.554590] ixgbe 0000:06:00.0: 00:e0:ed:79:06:56 [ 6.556994] ixgbe 0000:06:00.0: Intel(R) 10 Gigabit Network Connection [ 6.557160] ixgbe 0000:06:00.1: PCI INT B: failed to register GSI [ 6.557169] ixgbe: probe of 0000:06:00.1 failed with error -28
Comparing the successful initializations to the failing one, I can see that all of the successful ones were able to use MSI-X interrupts, so multiqueue was enabled. It appears that the failing one did not get MSI-X and so tried to fail back to legacy interrupts and failed to get that as well - or at least it failed to get the second IRQ that the driver would use in that mode. If the platform only provides one legacy interrupt per slot, it could fail like this. Still, the real problem is not getting MSI-X, because these devices really only work well with MSI-X interrupts.
Without any platform information, this could either be a hardware limitation - not enough MSI-X vectors available - or a platform firmware problem. Can you send information on your platform? The output from 'lspci -vvv' and 'uname -a' might yield more clues.
The full dmesg log would also be helpful because there should be a lot of information in there on the interrupts available.
-- Mark Rustad, Networking Division, Intel Corporation
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