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The algorithm change cited as solving those XFS metadata problems is delayed logging, both in that 2012 linux.conf.au slide deck and the LWN write up of it. Commit history of the documentation shows that the experimental flag was removed in 5d0af85. As this was circa October 2010, Linux 2.6.37: xfs: remove experimental tag from the delaylog option ...


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As a commenter mentioned, you're calling the wrong program. The reboot binary is at /sbin/reboot, not at /usr/bin/reboot. The latter is a symbolic link to consolehelper, which is a wrapper that lets non-root users run the corresponding program in /sbin under certain circumstances. You can see its man page if you're really interested in how it works, but as ...


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