Messages in this thread | | | From | "Verma, Vishal L" <> | Subject | [BISECTED] nvme probe failure with v5.13-rc1 | Date | Fri, 21 May 2021 05:00:29 +0000 |
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Hi,
I ran into this failure to probe an nvme device in an emulator (simics). It looks like there is a ~60 second wait followed by a timeout and a failure to boot (the root device is an nvme disk) with these messages in the log:
[ 67.174010] nvme nvme0: I/O 5 QID 0 timeout, disable controller [ 67.175793] nvme nvme0: Removing after probe failure status: -4
I bisected this to: 5befc7c26e5a ("nvme: implement non-mdts command limits")
It's not immediately obvious to me what's causing the problem. Reverting the above commit fixes it. It is easily reproducible - I'd be happy to provide more info about the emulated device or test out patches or theories.
It is of course possible that the emulated device is behaving in some non spec-compliant way, in which case I'd appreciate any help figuring out what that is.
Thanks, -Vishal
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