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[Bug 1047152] btrfs: BTRFS_QUOTA_CTL_DISABLE causes hang
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 04 Jul 2017 11:46:18 +0000
  • Message-id: <bug-1047152-21960-eE9PTBqetz@http.bugzilla.opensuse.org/>
http://bugzilla.opensuse.org/show_bug.cgi?id=1047152
http://bugzilla.opensuse.org/show_bug.cgi?id=1047152#c6

Aleksa Sarai <asarai@xxxxxxxx> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |IN_PROGRESS

--- Comment #6 from Aleksa Sarai <asarai@xxxxxxxx> ---
I've figured out what the issue is. It's caused btrfs_qgroup_rescan_resume not
being called if you mount a filesystem as ro and then remount it as rw later.
It appears this is what systemd does during boot. I've prepared a patch which
I'm attaching here and I'll send to LKML.

I've tested it and it fixed the problem on my machine (clearing the flag
completely so when I rebooted into an old kernel the problem was resolved, and
crash_btrfs no longer caused the issue).

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