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XFS binary code size

To: xfs@xxxxxxxxxxx
Subject: XFS binary code size
From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
Date: Mon, 26 Sep 2011 18:12:45 -0500
Reply-to: stan@xxxxxxxxxxxxxxxxx
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I'm curious about the footprint of the XFS binary code, specifically for 32 bit systems, but knowing the 64 bit case would be educational as well for comparison. I don't use kernel modules or I'd already have a rough answer. My last build was but I'm sure the size hasn't changed much in more recent kernels. My XFS build options were:

$ grep -i xfs .config
# CONFIG_XFS_QUOTA is not set
# CONFIG_XFS_RT is not set

My resulting kernel image is:
$ la /boot/vmlinuz-
-rw-r--r--  1 root root 1.6M May 17 23:55 vmlinuz-

How much of that 1.6MB is XFS? Also, what is the size of the hot path code that we want to stay in L1 during heavy IO?


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