linux-kernel - Re: [PATCH 0/8] unwind, arm64: add sframe unwinder for kernel

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Message-ID: <CAPhsuW7f5--hzr0Y3eb1JNpfNqepJuE92yq3y8dzaL_mQF+U5w@mail.gmail.com>
Date: Thu, 30 Jan 2025 10:34:09 -0800
From: Song Liu <song@...nel.org>
To: Weinan Liu <wnliu@...gle.com>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Indu Bhagat <indu.bhagat@...cle.com>, Peter Zijlstra <peterz@...radead.org>, 
	Mark Rutland <mark.rutland@....com>, roman.gushchin@...ux.dev, 
	Will Deacon <will@...nel.org>, Ian Rogers <irogers@...gle.com>, linux-toolchains@...r.kernel.org, 
	linux-kernel@...r.kernel.org, live-patching@...r.kernel.org, 
	joe.lawrence@...hat.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/8] unwind, arm64: add sframe unwinder for kernel

On Thu, Jan 30, 2025 at 9:59 AM Song Liu <song@...nel.org> wrote:
>
> I missed this set before sending my RFC set. If this set works well, we
> won't need the other set. I will give this one a try.

I just realized that llvm doesn't support sframe yet. So we (Meta) still
need some sframe-less approach before llvm supports sframe.

IIRC, Google also uses llvm to compile the kernel. Weinan, would
you mind share your thoughts on how we can adopt this before
llvm supports sframe? (compile arm64 kernel with gcc?)

Thanks,
Song