From: "Luck, Tony" <tony.luck@intel.com>
To: Joe Perches <joe@perches.com>
Cc: Doug Thompson <dougthompson@xmission.com>,
Borislav Petkov <bp@alien8.de>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] skx_edac: Move a few hundred bytes to text from data using const
Date: Mon, 22 Aug 2016 09:46:04 -0700 [thread overview]
Message-ID: <20160822164603.GA24307@intel.com> (raw)
In-Reply-To: <8edda9e0b7357f5177d9f3bb536a71025379f9cb.1471824129.git.joe@perches.com>
On Sun, Aug 21, 2016 at 05:02:41PM -0700, Joe Perches wrote:
> Marking arrays as const makes for smaller data.
Joe,
"a few hundred" seems to be exaggeration.
Before:
$ size drivers/edac/skx_edac.ko
text data bss dec hex filename
8435 1024 24 9483 250b drivers/edac/skx_edac.ko
After:
$ size drivers/edac/skx_edac.ko
text data bss dec hex filename
8531 944 24 9499 251b drivers/edac/skx_edac.ko
so "data" was reduced by 80 bytes, but "text" went up by 96.
Net increase of 16 (perhaps because some padding for alignment???)
Making read-only data const is a good idea in general, but
do we want to do it if it *increases* kernel footprint?
-Tony
next prev parent reply other threads:[~2016-08-22 16:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 0:02 [PATCH] skx_edac: Move a few hundred bytes to text from data using const Joe Perches
2016-08-22 16:46 ` Luck, Tony [this message]
2016-08-22 16:57 ` Joe Perches
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160822164603.GA24307@intel.com \
--to=tony.luck@intel.com \
--cc=bp@alien8.de \
--cc=dougthompson@xmission.com \
--cc=joe@perches.com \
--cc=linux-edac@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mchehab@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox