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SubjectRE: [PATCH v5 00/21] kprobes: Unify kretprobe trampoline handlers and make kretprobe lockless
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> From: peterz@infradead.org <peterz@infradead.org>
>
> I'm now trying and failing to reproduce.... I can't seem to make it use
> int3 today. It seems to want to use ftrace or refuses everything. I'm
> probably doing it wrong.
>

You can turn off CONFIG_KPROBES_ON_FTRACE (and also sysctl debug.kprobes-optimization) to make it use int3 handler


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