linux-kernel - Re: [PATCH v7 0/6] x86/vdso: VDSO updates and fixes for sframes

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Message-ID: <4fb3f0d2-b916-409b-995a-7dd801df0d0f@linux.ibm.com>
Date: Fri, 6 Feb 2026 16:02:44 +0100
From: Jens Remus <jremus@...ux.ibm.com>
To: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        bpf@...r.kernel.org, x86@...nel.org, linux-mm@...ck.org,
        Steven Rostedt <rostedt@...nel.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>, "H. Peter Anvin" <hpa@...or.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrii Nakryiko <andrii@...nel.org>,
        Indu Bhagat <indu.bhagat@...cle.com>,
        "Jose E. Marchesi" <jemarch@....org>,
        Beau Belgrave <beaub@...ux.microsoft.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Florian Weimer <fweimer@...hat.com>, Kees Cook <kees@...nel.org>,
        "Carlos O'Donell" <codonell@...hat.com>, Sam James <sam@...too.org>,
        Dylan Hatch <dylanbhatch@...gle.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Hildenbrand <david@...hat.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
        Michal Hocko
 <mhocko@...e.com>, Mike Rapoport <rppt@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
Subject: Re: [PATCH v7 0/6] x86/vdso: VDSO updates and fixes for sframes

On 2/3/2026 6:19 PM, Jens Remus wrote:
> This enables generation of SFrame V3 stack trace information for VDSO on
> x86-64.  It's a continuation of Josh's and Steve's work:
> 
>    https://lore.kernel.org/all/cover.1737511963.git.jpoimboe@kernel.org/
>    https://lore.kernel.org/all/20250422183439.895236512@goodmis.org/

Above is the link to Steven's v5 of the series on which I based my v6:
https://lore.kernel.org/all/20260129112726.892340-1-jremus@linux.ibm.com/

I just realized that Steven's latest version actually was v6:
https://lore.kernel.org/all/20250425023750.669174660@goodmis.org/

That is why I also messed up the series' versioning and erroneously sent
mine as v6 as well.  Sorry for that!

I'll incorporate all of the missing original v6 changes and review
feedback into v8.  Following is an excerpt from the range-diff between
Steven's v6 and my v6 showing the only missing change in commit subject
of patch 3:

3:  6ce4adda138b ! 3:  9b59e14424b0 x86/asm: Use CFI_* macros in SYM_FUNC_* macros so they can be added to VDSO
    @@ Metadata
     Author: Josh Poimboeuf <jpoimboe@...nel.org>

      ## Commit message ##
    -    x86/asm: Use CFI_* macros in SYM_FUNC_* macros so they can be added to VDSO
    +    x86/asm: Simplify VDSO DWARF generation

         Add CFI_STARTPROC and CFI_ENDPROC annotations to the SYM_FUNC_* macros
         so the VDSO asm functions don't need to add them manually.  Note this
         only affects VDSO, the CFI_* macros are empty for the kernel proper.

    +    [ Jens Remus: Reword commit subject and message as suggested by Josh. ]
    +
         Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
    -    [ Fixed rebased issues. ]
         Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
    +    Signed-off-by: Jens Remus <jremus@...ux.ibm.com>

      ## arch/x86/entry/vdso/vdso-layout.lds.S ##
     @@

Regards,
Jens
-- 
Jens Remus
Linux on Z Development (D3303)
jremus@...ibm.com / jremus@...ux.ibm.com

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