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From: Ivan Voras <ivoras@freebsd.org>
Date: Mon, 31 May 2010 11:08:48 +0200
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Subject: Re: SUJ and "mount" reporting
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On 05/31/10 02:25, Bjoern A. Zeeb wrote:
> On Mon, 31 May 2010, Ivan Voras wrote:
> 
>> Shouldn't SU+J be visible in the output of "mount" somehow? I've just
>> enabled it on a root file system of a machine and while tunefs and
>> dumpfs report both soft-updates and SUJ are enabled (after reboot),
>> the "mount" command only shows "soft-updates". Alternative question:
>> how to verify is it active on a live file system?
>>
>> (running CURRENT from a few hours ago, kernel&world synced)
> 
> As previously stated - this is a hack to do what I think you are
> asking for:
> http://people.freebsd.org/~bz/20100309-03-mount.diff

Yes, this looks like it...

> Using tunefs, etc. for now would be better.

I did use tunefs, as I've said, but I'm concerned what would happen (if
it can - stale kernel?) if the superblock that tunefs reads from the
disk and the kernel state are different.