Yes, 28.1, I got the message when I run my c program, four of them, I guess one for each core.
Searching in google, I found that many people, whom problem is not related to this message, have this message in the kernel, so I guess is normal. However would be nice if Nvidia could investigate, since it does not make any sense.
Would be nice if Nvidia could include in the documentation, the dmesg of a normal working tx1, so that one can compare and see what message can be ignored.
Also in the kernel I got:
pci 0000:00:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
fast_enable_write: Failed to get cpuidle driver
vi 54080000.vi: vi_probe: failed
vi: probe of 54080000.vi failed with error -22
xhci-tegra 70090000.xusb: can’t get usb3-1 phy (-517)
tegra_soctherm 700e2000.soctherm: throttrip: pll: missing hot temperature
tegra_soctherm 700e2000.soctherm: failed to register sensor: -19
gk20a 57000000.gpu: platform probe failed
and some others that seems to be common.
However everything seems to work.