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Re: [PATCH] Make inode64 a remountable option

To: xfs@xxxxxxxxxxx
Subject: Re: [PATCH] Make inode64 a remountable option
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 17 Aug 2012 11:42:44 +1000
In-reply-to: <20120817012030.GB16013@xxxxxxxxxxxxxxxxxxxxxxxx>
References: <1345142110-6412-1-git-send-email-cmaiolino@xxxxxxxxxx> <502D56B9.9080606@xxxxxxxxxx> <20120817012030.GB16013@xxxxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Thu, Aug 16, 2012 at 10:20:30PM -0300, Carlos Maiolino wrote:
> > Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> > 
> > I do have a question though... do we care about the remount from inode64
> > to non-inode64 case?
> > 
> I thought about it, but, once we enable inode64 option, remounting it back to
> inode32 may create problems to access inodes greater than (1<<32) - 1, so, I
> don't think we should make inode32 a remountable option.

You can still read, modify and unlink inodes w/ numbers greater than
32 bits when inode32 is active - you just can't allocate new inodes
in those AGs. Hence going back the other way would still be safe to
do on remount, I think.


Dave Chinner

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