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XFS dirty after sync/reboot?

To: xfs@xxxxxxxxxxx
Subject: XFS dirty after sync/reboot?
From: Phillip Susi <psusi@xxxxxxxxxx>
Date: Fri, 25 Jan 2013 13:32:55 -0500
Cc: linux-fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130107 Thunderbird/17.0.2
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While triaging a bug filed in Ubuntu involving odd reboot failures, it
appears that XFS leaves the filesystem in a corrupt state that
requires journal playback to fix after a sync or reboot.  Grub2
doesn't seem to understand the journal, leading to all kinds of
confusion after the reboot.

Shouldn't a full sync or remount to r/o flush the journal transactions
and leave the fs fully clean?

Original bug report: https://launchpad.net/bugs/1103187

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