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Date:   Wed, 24 Apr 2019 20:31:26 +0200 (CEST)
From:   Miroslav Benes <>
To:     Petr Mladek <>
cc:     Jiri Kosina <>,
        Josh Poimboeuf <>,
        Joe Lawrence <>,
        Kamalesh Babulal <>,,
Subject: Re: [PATCH 1/3] livepatch: Convert error about unsupported reliable
 stacktrace into a warning

On Wed, 24 Apr 2019, Petr Mladek wrote:

> The commit d0807da78e11d46f ("livepatch: Remove immediate feature") caused
> that any livepatch was refused when reliable stacktraces were not supported
> on the given architecture.
> The limitation is too strong. User space processes are safely migrated
> even when entering or leaving the kernel. Kthreads transition would
> need to get forced. But it is safe when:
>    + The livepatch does not change the semantic of the code.
>    + Callbacks do not depend on a safely finished transition.
> Suggested-by: Josh Poimboeuf <>
> Signed-off-by: Petr Mladek <>

Acked-by: Miroslav Benes <>


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