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Date:	Thu, 22 Oct 2015 22:06:33 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 93031] root becomes read-only at boot due to
 journal_async_commit in /etc/fstab

https://bugzilla.kernel.org/show_bug.cgi?id=93031

Andrey Lelikov <bugzillakernel1@...ik.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzillakernel1@...ik.org

--- Comment #3 from Andrey Lelikov <bugzillakernel1@...ik.org> ---
I also experience same behaviour. The system is unbootable. Please note, that i
do NOT have journal_checksum in fstab. On a kernel that works I have the
following:

/etc/fstab:
/dev/mapper/root_crypt /               ext4   
errors=remount-ro,data=writeback,noatime,nobarrier,journal_async_commit,commit=120,dioread_nolock

/proc/mounts:
/dev/disk/by-uuid/a3dc1a73-42b9-4295-b0b0-93934b57d317 / ext4
rw,noatime,dioread_nolock,journal_checksum,journal_async_commit,nobarrier,errors=remount-ro,commit=120,data=writeback

On 3.18 (ubuntu trusty) I can't boot any way - regular boot fails to mount,
mount -o remount doesn't work with any options - with or without
journal_async_commit and/or journal_checksum.

Note that on 3.13 everything works, all flags are properly applied and they are
NOT silently ignored.

So this is a bug, but it is yet in denial stage. "remove journal_checksum from
fstab, or add it to rootflags, everything works, la-la-la". Pedantic idiots.

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