Hi!

On 10/03/2021 17:14, Florian Fainelli wrote:

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I tried on 5.12-rc2 and 5.11 but couldn't reproduce the problem using your

I still can't reproduce on 5.12-rc2.

I do have CONFIG_ARM_MODULE_PLTS=y. Do you need to do something else after
loading the module? I tried starting ftrace, but maybe there's a particular
combination required?

You need to load a BIG module, so big that it has no place in the modules area
any more and goes to vmalloc area.

You absolutely need a very big module maybe more than one. When I tested
this, I could use the two proprietary modules (*sigh*) that I needed to
exercise against and loading one but not the other was not enough to
make the second module loading spill into vmalloc space.

Here is what I use instead of these real world "proprietary" modules (which of course
were the real trigger for the patch):

https://www.spinics.net/lists/arm-kernel/msg878599.html

-- 
Best regards,
Alexander Sverdlin.

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