On Tue, May 19, 2015 at 11:46 AM, Reindl Harald h.reindl@thelounge.net wrote:
commit 8f4d855839179f410fa910a26eb81d646d628f26 Author: Theodore Ts'o tytso@mit.edu Date: Thu May 14 18:19:01 2015 -0400
ext4: fix lazytime optimization We had a fencepost error in the lazytime optimization which means
that timestamp would get written to the wrong inode.
Cc: stable@vger.kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
which looks like it's probably the culprit. This was broken since:
commit a26f49926da938f47561f386be56a83dd37a496d Author: Theodore Ts'o tytso@mit.edu Date: Mon Feb 2 00:37:02 2015 -0500
ext4: add optimization for the lazytime mount option
wow - and nobody noticed all the months that mtimes are randomly changing all over the system while it takes exactly one day to get rkhunter mails and rsync listing a ton of untouched files
That isn't really all that surprising. The lazytime mount option is very new, isn't used by default anywhere, and likely isn't widely tested outside of the usecase the original developers had in mind.
josh