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Date: Fri, 05 Dec 2014 14:08:46 -0800
From: Robert White <rwhite@pobox.com>
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Subject: General Question: ctime, mtime, and xattrs
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So I was reading the wiki on the internal layout. The INODE description 
says "st_ctime. Also updated when xattrs change."

Why isn't changing the xattrs a modification (st_mtime) event?

It just seems odd to me...