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Re: [PATCH 0/4] support for text-relative kallsyms table

From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject Re: [PATCH 0/4] support for text-relative kallsyms table
Date 2016-01-20 13:00 +0100
Message-ID <qSZAD-5Pv-23@gated-at.bofh.it> (permalink)
References <qSWW6-4hT-3@gated-at.bofh.it> <qSYlc-56e-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wednesday 20 January 2016 11:33:25 Ingo Molnar wrote:
> > The reduction ranges from around 250 KB uncompressed vmlinux size and 10 KB 
> > compressed size (s390) to 3 MB/500 KB for ppc64 (although, in the latter case, 
> > the reduction in uncompressed size is primarily __init data)
> 
> So since kallsyms is in unswappable kernel RAM, the uncompressed size reduction is 
> what we care about mostly. How much bootloader load times are impacted is a third 
> order concern.
> 
> IOW a nice change!

I think some people care a lot about the compressed size as well:

http://git.openwrt.org/?p=openwrt.git;a=blob;f=target/linux/generic/patches-4.4/203-kallsyms_uncompressed.patch;h=cf8a447bbcd5b1621d4edc36a69fe0ad384fe53f;hb=HEAD

This has been in openwrt.git for ages, because a lot of the target devices
are much more limited on flash memory size (4MB typically) than they are
on RAM size (at least 32MB).

	Arnd

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Thread

[PATCH 0/4] support for text-relative kallsyms table Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-01-20 10:10 +0100
  [PATCH 1/4] kallsyms: add support for relative offsets in kallsyms address table Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-01-20 10:10 +0100
    Re: [PATCH 1/4] kallsyms: add support for relative offsets in  kallsyms address table Kees Cook <keescook@chromium.org> - 2016-01-20 20:20 +0100
  Re: [PATCH 0/4] support for text-relative kallsyms table Ingo Molnar <mingo@kernel.org> - 2016-01-20 11:40 +0100
    Re: [PATCH 0/4] support for text-relative kallsyms table Arnd Bergmann <arnd@arndb.de> - 2016-01-20 13:00 +0100
  Re: [PATCH 0/4] support for text-relative kallsyms table Rusty Russell <rusty@rustcorp.com.au> - 2016-01-21 06:20 +0100
    Re: [PATCH 0/4] support for text-relative kallsyms table Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-01-21 07:50 +0100
      Re: [PATCH 0/4] support for text-relative kallsyms table Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-01-21 09:40 +0100
        Re: [PATCH 0/4] support for text-relative kallsyms table Rusty Russell <rusty@rustcorp.com.au> - 2016-01-27 05:40 +0100

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