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From: Nathan Scott <nscott@aconex.com>
To: Dave Chinner <david@fromorbit.com>
Cc: TuxOnIce Devel List <tuxonice-devel@lists.tuxonice.net>, xfs@oss.sgi.com
Subject: Re: [TuxOnIce-devel] Latest updates.
Date: Wed, 13 Jan 2010 17:05:18 +1100 (EST)	[thread overview]
Message-ID: <99724068.1731191263362718752.JavaMail.root@mail-au.aconex.com> (raw)
In-Reply-To: <20100113054152.GL17483@discord.disaster>

[Looks like tuxonice is a subscriber-only list...]

----- "Dave Chinner" <david@fromorbit.com> wrote:

> On Wed, Jan 13, 2010 at 02:09:14PM +1100, Nathan Scott wrote:
> > > 
> Agreed that it is trivial to implement but there are still some
> definite traps - like the fact the sb change transaction may be
> logged
> immediately but the physical superblock may not get written for some
> time after the mount.

*nod* ... it will be written when unmounted though...

> 
> Really it comes down to the interface used to read the mount time
> fromt eh superblock at suspend and resume - can anyone tell me what
> that is or point me at the code?

(not me!)

> Personally I don't see why this needs to be in the superblock - an
> extended attribute on the root directory of the root filesystem that
> is written:

Yeah, that was my first thought too, but I suspect they want to be
able to query this when the filesystem is unmounted; in which case
the interface is probably "read a fs-specific magic spot ondisk".
For this not-mounted query, the EA route would be incredibly painful.

cheers.

-- 
Nathan

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  reply	other threads:[~2010-01-13  6:04 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <2097834991.1721031263351861134.JavaMail.root@mail-au.aconex.com>
2010-01-13  3:09 ` [TuxOnIce-devel] Latest updates Nathan Scott
2010-01-13  5:41   ` Dave Chinner
2010-01-13  6:05     ` Nathan Scott [this message]
2010-01-13  6:57       ` Dave Chinner
2010-01-13  8:11         ` Dave Chinner
2010-01-13  8:44           ` Nigel Cunningham

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