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Date: Mon, 25 Apr 2011 16:07:55 -0400
From: Zhao Cai <zhaocai@...com>
To: Eric Sandeen <sandeen@...hat.com>
Cc: Amir Goldstein <amir73il@...il.com>,
ext4 mailing list <linux-ext4@...r.kernel.org>
Subject: Re: ext4_put_super is not called during system shutdown or restart
In that case, how to make sure all the jbd2 transactions are fininshed before reboot? is it ext4_freeze and jbd2_journal_flush?
Thanks.
--
All the best,
Zhao Cai
On Apr 25, 2011, at 12:12 PM, Zhao Cai wrote:
> On Apr 25, 2011, at 12:10 PM, Eric Sandeen wrote:
>
>> On 4/25/11 11:05 AM, Zhao Cai wrote:
>>> Sorry, my mistake. It happens only when ext4 is the root file system.
>>
>> that makes sense, since root is never actually unmounted; it just goes to readonly.
>>
>> -Eric
>
> Thanks. That means it is designed to be like this!
>
>>> -Zhao
>>>
>>>
>>> On Apr 25, 2011, at 11:02 AM, Amir Goldstein wrote:
>>>
>>>> On Monday, April 25, 2011, Eric Sandeen <sandeen@...hat.com> wrote:
>>>>> On 4/24/11 11:12 PM, Zhao Cai wrote:
>>>>>> I would appreciate if anyone can give me an answer. Is it designed to
>>>>>> be like this?
>>>>>>
>>>>>> Detailed situation: The system is ubuntu 11.04 installed in VMware. I
>>>>>> notice that ext4_put_super() is called when I unmount a non-root ext4
>>>>>> partition. But it is not when I restart or shutdown the system.
>>>>>
>>>>> Even for a non-root filesystem?
>>>>>
>>>>> I don't know if ubuntu does anything special, but I would expect that during a system shutdown, non-root filesystems would be unmounted, and you'd get put_super called. Unless the fs is busy and it can't be unmounted for some reason...
>>>>
>>>> This strangely reminds me of my report that xfstests sometimes fails
>>>> to umount on Ubuntu 10.10.
>>>> But I could be just trying to hold on to the hope of somebody else
>>>> solving my problems...
>>>>
>>>>>
>>>>> -Eric
>>>>>
>>>>>> Thanks。
>>>>>>
>>>>>> -- All the best,
>>>>>>
>>>>>> Zhao Cai
>>>>>>
>>>>>>
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>>>>>
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>>>
>>
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