Date: Fri, 10 Aug 2012 10:26:04 -0500
From: Serge Hallyn <serge.hallyn@canonical.com>
To: Josh Triplett <josh@joshtriplett.org>
Cc: Alex Kelly <alex.page.kelly@gmail.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>, Kees Cook <keescook@chromium.org>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCHv4 2/3] fs: Make core dump functionality optional
Message-ID: <20120810152604.GA27585@sergelap>
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 <20120810132323.GA21048@sergelap>
 <20120810150157.GA23457@leaf>
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Quoting Josh Triplett (josh@joshtriplett.org):
> On Fri, Aug 10, 2012 at 08:23:23AM -0500, Serge Hallyn wrote:
> > Quoting Alex Kelly (alex.page.kelly@gmail.com):
> > > Adds an expert Kconfig option, CONFIG_COREDUMP, which allows disabling of core dump.
> > > This saves approximately 2.6k in the compiled kernel, and complements CONFIG_ELF_CORE,
> > > which now depends on it.
> > 
> > Is there another reason than the 2.6k to do this?  My kernels range
> > between 4.8 and 5M, so that's .05% size savings?
> 
> A kitchen-sink kernel might take up that much space, but you can build a
> minimal embedded kernel that only takes up ~200k, at which point 2.6k
> represents a >1% decrease.  Add a few more changes like this, and those
> decreases start to add up.  At this point, no one thing you can chop out
> of the kernel will give you a 100k decrease by itself; you need a pile
> of changes like this one to do that.
> 
> - Josh Triplett

I see.  That's an order of magnitude smaller than what i figured you'd
get with a reasonable kernel  :)
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