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
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