linux-kernel - Re: Question Regarding ERMS memcpy

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Message-ID: <20170305130553.ywmelbhh2dm2q7om@pd.tnic>
Date:   Sun, 5 Mar 2017 14:05:53 +0100
From:   Borislav Petkov <bp@...e.de>
To:     hpa@...or.com
Cc:     Logan Gunthorpe <logang@...tatee.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Tony Luck <tony.luck@...el.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Question Regarding ERMS memcpy

On Sun, Mar 05, 2017 at 12:18:23PM +0100, Borislav Petkov wrote:
> Also, I need to check what vmlinuz size bloat we're talking: with the
> diff below, we do add padding which looks like this:

Yeah, even a tailored config adds ~67K:

   text    data     bss     dec     hex filename
7567290 4040894 2560000 14168184         d83078 vmlinux
7635332 4041694 2560000 14237026         d93d62 vmlinux.memcpy

I'm assuming allmodconfig would become even bigger.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--