linux-kernel - Re: [PATCH 1/3] mm: page_alloc: Reduce object size by neatening printks

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Message-ID: <20170316105627.GB30508@dhcp22.suse.cz>
Date:   Thu, 16 Mar 2017 11:56:27 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/3] mm: page_alloc: Reduce object size by neatening
 printks

On Wed 15-03-17 18:43:13, Joe Perches wrote:
> Function calls with large argument counts cause x86-64 register
> spilling.  Reducing the number of arguments in a multi-line printk
> by converting to multiple printks which saves some object code size.
> 
> $ size mm/page_alloc.o* (defconfig)
>    text    data     bss     dec     hex filename
>   35914	   1699	    628	  38241	   9561	mm/page_alloc.o.new
>   36018    1699     628   38345    95c9 mm/page_alloc.o.old
> 
> Miscellanea:
> 
> o Remove line leading spaces from the formerly multi-line printks
>   commit a25700a53f71 ("mm: show bounce pages in oom killer output")
>   back in 2007 started the leading space when a single long line
>   was split into multiple lines but the leading space was likely
>   mistakenly kept and subsequent commits followed suit.
> o Align arguments in a few more printks

This is really hard to review. Could you just drop all the whitespace
changes please?
-- 
Michal Hocko
SUSE Labs