linux-kernel - Re: [External] Re: [RFC 00/31] objtool, livepatch: Livepatch module generation

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Message-ID: <CAJKDkqj5VL7fbr2Cn8uW11_Megq8hjCjSTF1UkLLhLj6-KDV2Q@mail.gmail.com>
Date: Fri, 13 Sep 2024 11:16:53 -0700
From: "A K M Fazla Mehrab ." <a.mehrab@...edance.com>
To: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Song Liu <song@...nel.org>, Petr Mladek <pmladek@...e.com>, live-patching@...r.kernel.org, 
	linux-kernel@...r.kernel.org, x86@...nel.org, Miroslav Benes <mbenes@...e.cz>, 
	Joe Lawrence <joe.lawrence@...hat.com>, Jiri Kosina <jikos@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Marcos Paulo de Souza <mpdesouza@...e.com>
Subject: Re: [External] Re: [RFC 00/31] objtool, livepatch: Livepatch module generation

Hi Josh,

On Thu, Sep 12, 2024 at 9:06 AM Song Liu <song@...nel.org> wrote:
[...]
> > Red Hat (and Meta?) will start using it as soon as x86 support is ready,
> > because IBT/LTO support is needed, which kpatch-build can't handle.
>
> While we (Meta) do have a workaround in kpatch to build livepatch for
> kernels built with LTO, we will try to switch to this approach once
> the x86 support is ready.
>
> There are also other companies that would like to use LTO+livepatch
> combination.

We (ByteDance) would also like to try this approach as we are
interested in live patching LTO kernels.

Thanks,
Mehrab