linux-ext4 - Re: Bug In ext4 in kernels > 2.6.39 - Not mounting with arguments/options I specify in fstab on root remount

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Date:	Thu, 20 Oct 2011 23:29:54 -0500
From:	Matt Parnell <mparnell@...il.com>
To:	Ted Ts'o <tytso@....edu>
CC:	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: Bug In ext4 in kernels > 2.6.39 - Not mounting with arguments/options
 I specify in fstab on root remount

Also, note that the image is named vmlinuz26-zen there by mistake - I 
fixed that in my build script, but even so, it makes no difference. In 
3.0.7, I still can't remount root rw on ext4.

On 10/20/2011 10:29 PM, Matt Parnell wrote:
> The output of /proc/cmdline on 3.0.7:
>
> BOOT_IMAGE=/boot/vmlinuz26-zen root=/dev/sdb1 ro rootfstype=ext4 
> rootflags=data=writeback noatime nodiratime barrier=0 discard noinitrd
>
>
> On 10/09/2011 06:44 PM, Ted Ts'o wrote:
>> On Sun, Oct 09, 2011 at 05:10:54PM -0500, Matt Parnell wrote:
>>> /proc/mounts (as you can see it's not being remounted rw for some
>>> reason - /dev/sdc1 is the flash drive I used to pipe this info onto):
>>>
>>> rootfs / rootfs rw 0 0
>>> /dev/root / ext4 ro,relatime,barrier=1 0 0
>> Can you send me the output of /proc/cmdline?  It looks like the
>> rootflags command line option isn't getting passed to the kernel for
>> some reason.  That would explain why data=writeback isn't showing up
>> in /proc/mounts.
>>
>>                         - Ted
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