linux-kernel - Re: remount-ro & umount & quota interaction

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Message-ID: <47AB256A.5070304@msgid.tls.msk.ru>
Date:	Thu, 07 Feb 2008 18:36:10 +0300
From:	Michael Tokarev <mjt@....msk.ru>
To:	Jan Kara <jack@...e.cz>
CC:	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: remount-ro & umount & quota interaction

Jan Kara wrote:
[]
>> I mean, why it locks in the first place?  Quota subsystem trying
>> to write something into an read-only filesystem?  If so, WHY it
>> is trying to do that on umount instead on a remount-ro?

>   Actually, I couldn't reproduce the hang on my testing machine so I don't
> know exactly why it hangs. But my guess is that it's because we try to
> write to the filesystem...

I can't reproduce it here easily as well.  Yesterday I had a
locked-up console and had to hard-reboot the machine due to
this (it was far from first time when I've hit this issue),
but "on-demand reproducing" don't work (the uptime on that
host was about 100 days, and I had to do some repartition -
hence remount-ro to copy consistent data to other place -
maybe during that 100 day there was something... ;)

And I wasn't able to reproduce it on 2.6.24 so far, as well
(this one is only used on a test machine so far).

I'll keep trying ;)

Thanks for your support!

/mjt
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