Best way to debug an invalid opcode

Valdis Kl=?utf-8?Q?=c4=93?=tnieks valdis.kletnieks at
Thu Mar 19 05:54:37 EDT 2020

On Thu, 19 Mar 2020 10:22:25 +0100, Karaoui mohamed lamine said:

> I am currently encountering a kernel oops that indicate an "invalid opcode:
> 0000 [#1] SMP"
> I am working on this project

Oh geez.  Don't checkin a copy of the entire kernel.  Make your project be a
branch off the kernel.  Ain't nobody gonna dig through that to find what parts
of an old kernel the Linux-DSM code has messed with.

And you'll get smacked around with a large trout for starting a project 13 days
ago, and using an archaeological kernel as the base rather than 5.4 or later.
4.9 is close to 3 years ago.

[/usr/src/linux-next] git diff --shortstat v4.9..HEAD
 71938 files changed, 10664587 insertions(+), 4767026 deletions(-)

So yes... something probably splattered all over part of the kernel code.
Either that, or somebody did a branch to what they thought was a function
pointer but was actually a pointer to an anthill in eastern Zimbabwe or

But nobody wants to dig through your github tree to figure out what you did....

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