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Date:   Fri, 18 Feb 2022 12:08:08 -0800
From:   Josh Poimboeuf <>
To:     Alexander Lobakin <>
Cc:     Miroslav Benes <>,
        Fāng-ruì Sòng <>,,,
        Borislav Petkov <>,
        Jesse Brandeburg <>,
        Kristen Carlson Accardi <>,
        Kees Cook <>,
        Miklos Szeredi <>,
        Ard Biesheuvel <>,
        Tony Luck <>,
        Bruce Schlobohm <>,
        Jessica Yu <>,
        kernel test robot <>,
        Evgenii Shatokhin <>,
        Jonathan Corbet <>,
        Masahiro Yamada <>,
        Michal Marek <>,
        Nick Desaulniers <>,
        Herbert Xu <>,
        "David S. Miller" <>,
        Thomas Gleixner <>,
        Will Deacon <>, Ingo Molnar <>,
        Christoph Hellwig <>,
        Dave Hansen <>,
        "H. Peter Anvin" <>,
        Andy Lutomirski <>,
        Peter Zijlstra <>,
        Arnd Bergmann <>,
        Nathan Chancellor <>,
        Masami Hiramatsu <>,
        Marios Pomonis <>,
        Sami Tolvanen <>,
        "H.J. Lu" <>, Nicolas Pitre <>,,,,,
Subject: Re: [PATCH v10 02/15] livepatch: avoid position-based search if `-z
 unique-symbol` is available

On Fri, Feb 18, 2022 at 05:31:11PM +0100, Alexander Lobakin wrote:
> it took 2 minutes to generate the whole map (instead of a split
> second) (on 64-core CPU, but I guess nm runs in one thread).
> I guess it can be optimized? I'm no a binutils master (will take a
> look after sending this), is there a way to do it manually skipping
> this nm lag or maybe make nm emit filenames without such delays?

Hm, yeah, adding 2 minutes to the link time isn't going to fly ;-)  It
probably takes a while to parse all the DWARF.

Based on ther other discussions I think just using the basename (main.o)
in STT_FILE would be good enough.  Some duplicates are probably ok.


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