linux-ext4 - Re: ext4_put_super is not called during system shutdown or restart

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Message-id: <D949F3DA-E240-4BCF-A213-E4745FFE5D99@me.com>
Date:	Mon, 25 Apr 2011 12:05:38 -0400
From:	Zhao Cai <zhaocai@...com>
To:	Eric Sandeen <sandeen@...hat.com>,
	Amir Goldstein <amir73il@...il.com>
Cc:	ext4 mailing list <linux-ext4@...r.kernel.org>
Subject: Re: ext4_put_super is not called during system shutdown or restart

Sorry, my mistake. It happens only when ext4 is the root file system. 

-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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