Re: x86_64 Compiler Output Kernel Bloat v4.4

From	"H. Peter Anvin" <hpa@zytor.com>
Newsgroups	linux.kernel
Subject	Re: x86_64 Compiler Output Kernel Bloat v4.4
Date	2016-01-20 16:00 +0100
Message-ID	<qT2oP-7Xe-35@gated-at.bofh.it> (permalink)
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On January 20, 2016 6:40:35 AM PST, Steven Rostedt <rostedt@goodmis.org> wrote:
>On Tue, 19 Jan 2016 08:47:04 -0700
>Jeff Merkey <linux.mdb@gmail.com> wrote:
>
>
>> I'll check my CONFIG and see if there's a way to turn this off.
>> vmlinux.o is at 385MB on my build -- about 20% of that is this NOP
>> instruction for a trace program that in most cases is probably never
>> used.  Oink ... Oink ... Oink ...
>>
>
>The bloat is well known and was a sacrifice for the feature. This
>feature is optional. If you don't like it, simple disable all tracing.
>Then you'll save a lot of kernel text.
>
>-- Steve

Also, looking at vmlinux.o for size is bogus - most of that is debugging information.
-- 
Sent from my Android device with K-9 Mail. Please excuse brevity and formatting.

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x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-18 22:30 +0100
  Re: x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-18 22:40 +0100
  Re: x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-18 22:50 +0100
    Re: x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-18 22:50 +0100
      Re: x86_64 Compiler Output Kernel Bloat v4.4 Mihai Donțu <mihai.dontu@gmail.com> - 2016-01-18 23:20 +0100
    Re: x86_64 Compiler Output Kernel Bloat v4.4 Jiri Olsa <jolsa@redhat.com> - 2016-01-19 08:50 +0100
      Re: x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-19 16:40 +0100
        Re: x86_64 Compiler Output Kernel Bloat v4.4 Jeff Merkey <linux.mdb@gmail.com> - 2016-01-19 16:50 +0100
          Re: x86_64 Compiler Output Kernel Bloat v4.4 Steven Rostedt <rostedt@goodmis.org> - 2016-01-20 15:50 +0100
            Re: x86_64 Compiler Output Kernel Bloat v4.4 "H. Peter Anvin" <hpa@zytor.com> - 2016-01-20 16:00 +0100

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