linux-kernel - FYI -ffreestanding shrinks kernel by 2% on x86

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Message-ID: <20190511201344.GA11535@avx2>
Date:   Sat, 11 May 2019 23:13:44 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     x86@...nel.org
Subject: FYI -ffreestanding shrinks kernel by 2% on x86_64

On Sat, May 11, 2019 at 11:02:24PM +0300, Alexey Dobriyan wrote:
> I compiled current F29 kernel config on x86_64 (5.0.13-200.fc29.x86_64)
> with -ffreestanding. The results are interesting :^):
> 
> 	add/remove: 30/22 grow/shrink: 1290/46867 up/down: 33658/-1778055 (-1744397)
> 	Total: Before=83298859, After=81554462, chg -2.09% (!)
> 
> That's original config with modules compiled built-in.

Argh, it's the other way: adding -ffreestanding shrinks kernel by 2%.